erp5_test_result: scalability (1)

Conflicts:
	bt5/erp5_test_result/bt/revision
	bt5/erp5_test_result/bt/template_document_id_list
	bt5/erp5_test_result/bt/template_extension_id_list
(cherry picked from commit 63c1fc096663f6c96ab61e5acebe2dcbe801dfa5)

Conflicts:

	bt5/erp5_test_result/TestTemplateItem/portal_components/test.erp5.testTaskDistribution.py
	bt5/erp5_test_result/bt/revision
Scalability test distributor: respect ERP5ProjectUnitTestDistributor interface.

ERP5ProjectUnitTestDistributor.startTestSuite doesn't know about computer_guid parameter.

Conflicts:

	bt5/erp5_test_result/bt/revision
[erp5_test_results] Move Documents/Extensions to portal_component.
[erp5.util] testnode: Don't json.loads() data that has already been parsed.
[erp5.util] Disable scalability tests.
[erp5_test_result] Remove security configuration from generic bt.

No specific role should be defined for test-related portal_types.
[erp5_test_result] Fix typo and error in search parameter.