Use openstack-tox-cover template

Use openstack-tox-cover template, this runs the cover job as
non-voting in the check queue only.

Remove jobs and use template instead.

Add cover tox.ini environment - this job never worked before.

Change-Id: I9652aed41bc21bafc10e8c4a046d52bfb9681bdc

.zuul.yaml

@@ -28,6 +28,7 @@
 
 - project:
     templates:
+      - openstack-cover-jobs
       - openstack-python-jobs
       - openstack-python35-jobs
       - openstack-python36-jobs
@@ -40,6 +41,3 @@
       jobs:
         - cloudkittyclient-devstack-functional:
             voting: true
-    post:
-      jobs:
-        - openstack-tox-cover

tox.ini

@@ -12,6 +12,18 @@ deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands = stestr run {posargs}
 
+[testenv:cover]
+basepython = python3
+setenv =
+    VIRTUAL_ENV={envdir}
+    PYTHON=coverage run --source cloudkittyclient --parallel-mode
+commands =
+    stestr run '{posargs}'
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
+    coverage report
+
 [testenv:debug]
 basepython = python3
 commands = oslo_debug_helper {posargs}