Localizer,tests: fix translationContext that was working only in test

Test setup monkey-patched some function which we removed when merging
Zope4 support. This function was used in translationContext, it was
working fine in the tests, because the function was here thanks to the
monkey-patch, but it failed with ImportError when used for real.

This fixes the import to use the real getRequest and drop the patch to
prevent similar problems.

bt5/erp5_core_test/TestTemplateItem/portal_components/test.erp5.testLocalizer.py

@@ -180,11 +180,6 @@ assertEquals("This is 1€.", context.Base_translateString("This is 1€."))
     self.assertEqual("This is 1€.",
       self.portal.Base_translateString("This is 1€."))
 
-  def test_get_request(self):
-    # check that Localizer's get_request hack works as expected
-    from Products.Localizer.utils import get_request
-    self.assertEqual(get_request(), self.portal.REQUEST)
-
   def test_default_not_changed(self):
     """
     When there is no translation available for a given message, the default

product/ERP5Type/tests/ERP5TypeTestCase.py

@@ -85,16 +85,6 @@ config.product_config['deadlockdebugger'] = {'dump_url':'/manage_debug_threads'}
 
 from Testing.ZopeTestCase.layer import onsetup
 
-try:
-  # Workaround Localizer >= 1.2 patch that doesn't work with
-  # ZopeTestCase REQUESTs
-  from Products.Localizer import patches, utils
-  # revert monkey patches from Localizer
-  patches.get_request = get_request
-  utils.get_request = get_request
-except ImportError:
-  pass
-
 from Products.ERP5Type.tests.ProcessingNodeTestCase import \
   ProcessingNodeTestCase, patchActivityTool
 onsetup(patchActivityTool)()

product/Localizer/Localizer.py

@@ -27,6 +27,7 @@ from OFS.Folder import Folder
 from zLOG import LOG, ERROR, INFO, PROBLEM
 from zope.interface import implementer
 from zope.i18n import translate
+from zope.globalrequest import getRequest
 from ZPublisher.BeforeTraverse import registerBeforeTraverse, \
      unregisterBeforeTraverse, queryBeforeTraverse, NameCaller
 
@@ -258,9 +259,7 @@ class Localizer(LanguageManager, Folder):
             LOG('Localizer', PROBLEM,
                'Cannot change language inside a translationContext', error=True)
       MARKER = []
-      from .patches import get_request # late import, as this is patched by
-                                      # unit tests
-      request = get_request() # Localizer always use this request internally
+      request = getRequest()
       old_accept_language = request.get('AcceptLanguage', MARKER)
       request.set('AcceptLanguage', ForcedLanguage(lang))
       try: