Fix coverage configuration and execution

A number of configuration errors prevent the successful creation of code
coverage. This corrects the .coveragerc source/omit setup and the tox
package name generation.

http://lists.openstack.org/pipermail/openstack-dev/2015-October/076193.html

Change-Id: Ife807248caa66472bb30027eef3e68aedb035e7d

.coveragerc

@@ -1,7 +1,8 @@
 [run]
 branch = True
-source = vmware
-omit = vmware/tests/*,vmware/openstack/*
+source = oslo_vmware
+omit = oslo_vmware/tests/*
 
 [report]
 ignore_errors = True
+precision = 2

.gitignore

@@ -23,6 +23,7 @@ pip-log.txt
 
 # Unit test / coverage reports
 .coverage
+cover
 .tox
 nosetests.xml
 .testrepository

tox.ini

@@ -26,7 +26,7 @@ commands = python setup.py build_sphinx
 [testenv:cover]
 setenv = VIRTUAL_ENV={envdir}
 commands =
-  python setup.py testr --coverage
+  python setup.py test --coverage --coverage-package-name=oslo_vmware --testr-args='{posargs}'
 
 [testenv:venv]
 commands = {posargs}