mock module has been deprecated in favor of unittest.mock
which is part of the standard python library.
This review removes mock as a third party dependency, and
updates all unittest imports to use unittest.mock instead.
nova-api-proxy had mock as a test requirement, however it
was not using it.
This change has no impact on runtime code.
Test Plan:
PASS: tox passing for nfv
PASS: build-pkgs -p nfv
PASS: tox passing for nova-api-proxy
PASS: build-pkgs -p nova-api-proxy
Story: 2010531
Task: 47142
Signed-off-by: Al Bailey <al.bailey@windriver.com>
Change-Id: I991d07e87fbdc7fecc4e790550df2472b9b5b24b