test: fwk_module tests independent of the order

The execution order of the tests should not affect the tests.

The framework is reset and re-initiated in the setup function such that
the framework is in a known state before the start of each test.

Change-Id: Iea393f69b5f6fc294a6efa531cd122ba6758956b
Signed-off-by: Elieva Pignat <Elieva.Pignat@arm.com>