Add gerrit add zuul bits

tox: Add missing coverage target.

Change-Id: Ic756fc9732aad3da21e5f6937a706560ef292078

.gitignore

@@ -5,3 +5,5 @@
 build
 .unit-state.db
 *.swp
+.coverage
+cover

.gitreview

@@ -0,0 +1,4 @@
+[gerrit]
+host=review.opendev.org
+port=29418
+project=x/charm-interface-ovsdb.git

.zuul.yaml

@@ -0,0 +1,4 @@
+- project:
+    templates:
+      - openstack-python3-train-jobs
+      - openstack-cover-jobs

tox.ini

@@ -30,6 +30,33 @@ basepython = python3
 deps = -r{toxinidir}/test-requirements.txt
 commands = flake8 {posargs}
 
+[testenv:cover]
+# Technique based heavily upon
+# https://github.com/openstack/nova/blob/master/tox.ini
+basepython = python3
+deps = -r{toxinidir}/test-requirements.txt
+setenv =
+    {[testenv]setenv}
+    PYTHON=coverage run
+commands =
+    coverage erase
+    stestr run {posargs}
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
+    coverage report
+
+[coverage:run]
+branch = True
+concurrency = multiprocessing
+parallel = True
+source =
+    .
+omit =
+    .tox/*
+    */charmhelpers/*
+    unit_tests/*
+
 [testenv:venv]
 commands = {posargs}