The file test_examples.py has never worked since its written and and cli in
the example directory are covered by other functional tests for container,
flavor and object lists and they have better asserts. So, deleting the file

Change-Id: Ib9af40da96e66354fe878e79a80048a58f8dd6fe

functional tests should be grouped with other tests (unit and
integration tests). as part of this commit the "common" module
was renamed to just "base", this was done for simplicity.

the post_test_hook.sh file was also copied to the functional module
since it should live there. a separate change to the infra repo
will be made to call the new location, once that is merged we
can remove the old one (a new change will also be posted for that)

Needed-By: I49d54f009021d65c1ae49faf6b3f0a7acdadd7b3
Change-Id: Ie8c334f6223373b8e06df8bd8466500d2a2c8ede