ERP5ProjectUnitTestDistributor.startTestSuite doesn't know about computer_guid parameter.

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