[Fix gate]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.

Change-Id: I9177c69fd96ecacf164768b9e08f0e91d3a8690a
Partial-Bug: #1668848

.gitreview

@@ -1,5 +1,4 @@
 [gerrit]
-host=review.opendev.org
+host=review.openstack.org
 port=29418
 project=openstack/python-cloudkittyclient.git
-defaultbranch=stable/ocata

.zuul.yaml

@@ -1,8 +0,0 @@
-- project:
-    templates:
-      - openstack-python-jobs
-      - openstack-python35-jobs
-      - openstackclient-plugin-jobs
-    post:
-      jobs:
-        - openstack-tox-cover

test-requirements.txt

@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking<0.10,>=0.9.2
+hacking>=0.12.0,!=0.13.0,<0.14 # Apache-2.0
 
 coverage>=3.6 # Apache-2.0
 python-subunit>=0.0.18 # Apache-2.0/BSD

tox.ini

@@ -5,7 +5,7 @@ skipsdist = True
 
 [testenv]
 usedevelop = True
-install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt?h=stable/ocata} -U {opts} {packages}
+install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt} -U {opts} {packages}
 setenv =
    VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/requirements.txt