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

If the default identity API version were to change
in devstack, the v2.0 tests would fail today,
resulting in a broken OSC gate.

Change-Id: Id634ea7e0fab9f3772383b5512ccac19f5119ac0

tempest-lib is deprecated, so replace it with tempest.lib.

Co-Authored-By: Sheel Rana <ranasheel2000@gmail.com>

Change-Id: I0495eba110bb7581623fbcf49dc63a27e9cb6d64
Closes-Bug: #1553047

Remove exceptions.py from functional/common.
Import exception with the same code from the tempest_lib to tests.

Change-Id: Ifaa658209c18dd608836079f57ed18fcf10fb84e

This reverts commit 5032dbc8074d5133c6b71610cd57d3c8da07c9b9 based on [1].

[1] https://review.openstack.org/#/c/274703/

Change-Id: Ic10ef7c37d71e452fbc4bd36e28be79d669b4e3f

DevStack now uses identity v3 by default thus causing OSC to
only load openstack.identity.v3 commands. This prevents running
functional tests on openstack.identity.v2 commands. As a result,
this patch set skips all identity v2 functional tests to unblock
the gate.

Change-Id: I066187318be71792a966fa21226fab0d406c3758
Partial-Bug: #1539780

split test_identity.py into test_user.py, test_project, etc.
To make functional tests run repeatedly without raising
duplicated error, clean up resources before exiting each test case.

Change-Id: I8f31ccbd70f1cccdab8b3720aac179e2e399486d
Implements: blueprint identity-functional-tests