Fix bug in ScalabilityTestSuiteUtils.py: generatedConfiguration: Fix correct max computer number.
Fix properties in test_node

erp5_test_result: add/update ScalabilityDistributor and add portal_types/Test%20Result/view_graph.xml

ERP5ProjectUnitTestDistributor: add getTestType and subscribeNode methods (for scalaility compatibility)

Test should be independant and run in any order, so do not suggest a way to
force the order of tests.

there was issue with edit since getActiveProcess was called and
there was troubles with inexesting activity runtime environment

Code from Sven

This might break RSS rendering

Original code failed when 'limit' key is set to None.