ZODB Components: Components not actually loaded were never cleared of astroid AST module cache.

This fixes testDynamicClassGeneration failure since the migration of
IMovement (e8e5f273) which uncovered this issue.
5 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

00:51:56

passed ERP5.PerformanceTest-Master

00:32:47

failed ERP5.UnitTest-Master

01:29:59

passed SlapOS.Eggs.UnitTest-Master.Python2

00:19:28

passed SlapOS.Eggs.UnitTest-Master.Python3

00:27:21