Update test requirement
Since pbr already landed and the old version of hacking seems not
work very well with pbr>=2, we should update it to match global
requirement.
Partial-Bug:
Partial-Bug:
MODIFY
test-requirements.txt
test-requirements.txt
# process, which may cause wedges in the gate later.
# Hacking already pins down pep8, pyflakes and flake8
-hacking<0.11,>=0.10.0
+hacking>=0.12.0,!=0.13.0,<0.14 # Apache-2.0
coverage>=4.0 # Apache-2.0
fixtures>=3.0.0 # Apache-2.0/BSD
requests-mock>=1.1 # Apache-2.0
mock>=2.0 # BSD
-mox3!=0.19.0,>=0.7.0 # Apache-2.0
+mox3>=0.7.0,!=0.19.0 # Apache-2.0
oslosphinx>=4.7.0 # Apache-2.0
oslotest>=1.10.0 # Apache-2.0
python-openstackclient>=3.3.0 # Apache-2.0

Update test requirement

Since pbr already landed and the old version of hacking seems not
work very well with pbr>=2, we should update it to match global
requirement.
Partial-Bug: #1669276
Partial-Bug: #1668848

Change-Id: Id74bd427bbb7f1ffb364dd24ede18d920fe89c8c