The current ERP5 version used for our client uses the five.pt module.
If we do not install it explicitly it produces the following error when
testing:

```python
Traceback (most recent call last):
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/bin/runUnitTest", line 365, in <module>
    sys.exit(runUnitTest.main())
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/parts/erp5/Products/ERP5Type/tests/runUnitTest.py", line 879, in main
    run_only=run_only,
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/parts/erp5/Products/ERP5Type/tests/runUnitTest.py", line 572, in runUnitTestList
    layer.ZopeLite.setUp() # this will import custom_zodb.py
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/Zope2-2.13.30-py2.7.egg/Testing/ZopeTestCase/layer.py", line 26, in setUp
    func(*args, **kw)
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/Zope2-2.13.30-py2.7.egg/Testing/ZopeTestCase/ZopeLite.py", line 148, in _startup
    _theApp = Zope2.app()
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/Zope2-2.13.30-py2.7.egg/Zope2/__init__.py", line 51, in app
    startup()
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/Zope2-2.13.30-py2.7.egg/Zope2/__init__.py", line 47, in startup
    _startup()
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/Zope2-2.13.30-py2.7.egg/Zope2/App/startup.py", line 120, in startup
    load_zcml()
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/Zope2-2.13.30-py2.7.egg/Zope2/App/startup.py", line 52, in load_zcml
    load_site()
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/Zope2-2.13.30-py2.7.egg/Zope2/App/zcml.py", line 46, in load_site
    _context = xmlconfig.file(site_zcml)
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 649, in file
    include(context, name, package)
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 548, in include
    processxmlfile(f, context)
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 380, in processxmlfile
    parser.parse(src)
  File "/srv/slapgrid/slappart14/t/eoa/shared/python2.7/5946ea6f150e3d313513dba389733880/lib/python2.7/xml/sax/expatreader.py", line 111, in parse
    xmlreader.IncrementalParser.parse(self, source)
  File "/srv/slapgrid/slappart14/t/eoa/shared/python2.7/5946ea6f150e3d313513dba389733880/lib/python2.7/xml/sax/xmlreader.py", line 123, in parse
    self.feed(buffer)
  File "/srv/slapgrid/slappart14/t/eoa/shared/python2.7/5946ea6f150e3d313513dba389733880/lib/python2.7/xml/sax/expatreader.py", line 220, in feed
    self._parser.Parse(data, isFinal)
  File "/srv/slapgrid/slappart14/t/eoa/shared/python2.7/5946ea6f150e3d313513dba389733880/lib/python2.7/xml/sax/expatreader.py", line 384, in end_element_ns
    self._cont_handler.endElementNS(pair, None)
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 359, in endElementNS
    self.context.end()
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/config.py", line 558, in end
    self.stack.pop().finish()
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/config.py", line 706, in finish
    actions = self.handler(context, **args)
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/Zope2-2.13.30-py2.7.egg/OFS/metaconfigure.py", line 46, in loadProducts
    xmlconfig.include(_context, zcml, package=product)
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 548, in include
    processxmlfile(f, context)
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 380, in processxmlfile
    parser.parse(src)
  File "/srv/slapgrid/slappart14/t/eoa/shared/python2.7/5946ea6f150e3d313513dba389733880/lib/python2.7/xml/sax/expatreader.py", line 111, in parse
    xmlreader.IncrementalParser.parse(self, source)
  File "/srv/slapgrid/slappart14/t/eoa/shared/python2.7/5946ea6f150e3d313513dba389733880/lib/python2.7/xml/sax/xmlreader.py", line 123, in parse
    self.feed(buffer)
  File "/srv/slapgrid/slappart14/t/eoa/shared/python2.7/5946ea6f150e3d313513dba389733880/lib/python2.7/xml/sax/expatreader.py", line 220, in feed
    self._parser.Parse(data, isFinal)
  File "/srv/slapgrid/slappart14/t/eoa/shared/python2.7/5946ea6f150e3d313513dba389733880/lib/python2.7/xml/sax/expatreader.py", line 384, in end_element_ns
    self._cont_handler.endElementNS(pair, None)
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 359, in endElementNS
    self.context.end()
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/config.py", line 558, in end
    self.stack.pop().finish()
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/config.py", line 705, in finish
    args = toargs(context, *self.argdata)
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/config.py", line 1397, in toargs
    args[str(name)] = field.fromUnicode(s)
  File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/fields.py", line 139, in fromUnicode
    raise schema.ValidationError(v)
zope.configuration.xmlconfig.ZopeXMLConfigurationError: File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/eggs/Zope2-2.13.30-py2.7.egg/Zope2/utilities/skel/etc/site.zcml", line 16.2-16.23
    ZopeXMLConfigurationError: File "/srv/slapgrid/slappart14/t/eoa/soft/23ce02aa8134fb106bc2d3fe6f88f002/parts/erp5/product/ERP5Chameleon/configure.zcml", line 1.0-1.29
    ConfigurationError: ('Invalid value for', 'package', 'ImportError: Module five has no global pt')
```

Thus, this commit installs the same version that is used for our client.