Add nicer support for coverage

Just to encourage people to use the coverage tool (and write tests).

Change-Id: Ie30f9143a91363461aaaee59e0f9521d264dcd3e

.coveragerc

@@ -0,0 +1,7 @@
+[run]
+branch = True
+source = solum
+omit = solum/tests/*,solum/openstack/*
+
+[report]
+ignore-errors = True

.gitignore

@@ -27,6 +27,7 @@ pip-log.txt
 .coverage
 .testrepository
 .tox
+cover
 nosetests.xml
 
 # Translations

coverage.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+args=
+if [ -n "$@" ] ; then
+    args="-t $@"
+fi
+python setup.py testr --coverage --slowest "$args"
+python -m coverage report --show-missing
+echo "Coverage generated, see cover/index.html"