Basically, if you decide to override a method, that is because you want
to specify(or modify) the behavior of a method. If you just call the
inherited method from the overridden method, that is unnecessary.
Furthermore, every time when self.setUp() is called, now the super's
setUp() is called, which is basically exact the same behavior as
we have now.
TrivialFix
Change-Id: I9f4e03b93ff075c66b4e52342711c37f226d2f81
98255e6715