Adding generating coverage
Adding generating coverage

code coverage can be genarated with tox
using command tox -ecover

Change-Id: I5dcca1fe6ee57091cce62155757356f538b26061

stackforge/monasca-log-api,openstack/monasca-log-api,openstack/monasca-log-api,stackforge/monasca-log-api,openstack/monasca-log-api,stackforge/monasca-log-api