Fix the typo for the attribute word in comment and docstring.

Change-Id: Ic4a841c333d712a22503c1d7dc2d21619c601408

Now that we no longer support py27, we can use the standard library
unittest.mock module instead of the third party mock lib.

Change-Id: I7498ea2353cccca7b23d9ef74015a566ac431f90
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

Fix F601 failures:
F601 dictionary key '...' repeated with different values

Change-Id: I4c12f5a2348371966215e1ae05b726e6d04b0c8f

The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.

Fix problems found.

Change-Id: Ic161a8f88c28d88898863e5b9d9380016fbb0d08

Now requests-mock records request url in log[1], so it is
invalid to check that the logger output does NOT contain
request url.

Also, fix url passed to request mock as now it requires
complete url is passed

[1] https://github.com/jamielennox/requests-mock/pull/93

Change-Id: I4bab30a6705b7cab6b5a569dd61c442263e39995

This patch introduces the interface into listing project, to
specify parent_id to filter projects which has the given project
as their parent[1].

[1] https://docs.openstack.org/api-ref/identity/v3/?expanded=list-projects-detail#list-projects

Change-Id: If78030425468d4f99cba708540142871a2bf9190

This change adds access_rules as a parameter for creating application
credentials, and also adds the ability to list access rules and to
retrieve and delete individual rules. Directly creating an access rule
or updating one is not supported.

bp whitelist-extension-for-app-creds

Depends-On: https://review.opendev.org/671374
Change-Id: I490f1e6b421d4f36f588f83a511ce39b9b4204e2