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
c14d3efe61