ComponentTool: faster reload of test components

When editing a test component, only reload test component module, no
need to reload all components modules because other modules do not
depend on test module.
15 jobs for master in 0 seconds
latest
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

01:21:20

failed ERP5.PerformanceTest-Master

00:38:07

failed ERP5.UnitTest-Master

02:45:07

passed SlapOS.Eggs.UnitTest-Master.Python2

00:20:55

passed SlapOS.Eggs.UnitTest-Master.Python3

00:43:58

failed Wendelin.UnitTest-Master

00:45:36

passed ERP5.CodingStyleTest-Master

passed ERP5.CodingStyleTest-Master

01:44:41

passed ERP5.CodingStyleTest-Master

failed ERP5.PerformanceTest-Master

00:38:19

failed ERP5.UnitTest-Master

02:39:53

passed SlapOS.Eggs.UnitTest-Master.Python2

00:20:16

failed SlapOS.Eggs.UnitTest-Master.Python3

02:30:27

failed SlapOS.Eggs.UnitTest-Master.Python3

01:48:06

failed Wendelin.UnitTest-Master

00:55:19