Test was never ending processing activities:

2019-03-11T03:09:20 WARNING CMFActivity invalid after_path_and_method_id value: ('/erp5/organisation_module/2', 'immediateRecusriveReindexObject', 'immediateReindexObject')
Traceback (most recent call last):
  File "product/CMFActivity/Activity/SQLBase.py", line 319, in getValidationSQL
    validate_list.append(' AND '.join(method(v, quote)))
  File "product/CMFActivity/Activity/SQLBase.py", line 345, in _validate_after_path_and_method_id
    path, method_id = value
ValueError: too many values to unpack
2019-03-11T03:09:20 WARNING CMFActivity invalid after_path_and_method_id value: ('/erp5/organisation_module/2', 'immediateRecusriveReindexObject', 'immediateReindexObject')
Traceback (most recent call last):
  File "product/CMFActivity/Activity/SQLBase.py", line 319, in getValidationSQL
    validate_list.append(' AND '.join(method(v, quote)))
  File "product/CMFActivity/Activity/SQLBase.py", line 345, in _validate_after_path_and_method_id
    path, method_id = value
ValueError: too many values to unpack
2019-03-11T03:09:20 WARNING CMFActivity invalid after_path_and_method_id value: ('/erp5/organisation_module/2', 'immediateRecusriveReindexObject', 'immediateReindexObject')
Traceback (most recent call last):
  File "product/CMFActivity/Activity/SQLBase.py", line 319, in getValidationSQL
    validate_list.append(' AND '.join(method(v, quote)))
  File "product/CMFActivity/Activity/SQLBase.py", line 345, in _validate_after_path_and_method_id
    path, method_id = value
ValueError: too many values to unpack
2019-03-11T03:09:20 ERROR CMFActivity message uid 7256619472683296857L has a circular dependency

Fix this failing test by using the proper after_path_and_method_id syntax and also some other small changes to make the test fail earlier in case of problems.