[testActionManager] remove test process(test_runActionWithSystemUser).

The ownerid:USER_ID_SYSTEM only allows setting of type:ACTION_ISSUE_SENDER.
Run an exception(HATOHOL_ASSERT) ,if the type of ownerid:USER_ID_SYSTEM is
other than ownerid:USER_ID_SYSTEM.

Test of the normal route are exist, this test process is removed.
[ActionManager] modified the comment.