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.

Change-Id: Ib0a14b9a05c61ce154f8e24178fc3574e422ccc8

.coveragerc

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

.gitignore

@@ -14,7 +14,7 @@ AUTHORS
 .update-venv/
 ChangeLog
 openstack/versioninfo
-*.egg
+*.egg*
 .testrepository/
 .project
 .pydevproject

tox.ini

@@ -26,7 +26,7 @@ commands = {posargs}
 commands = python setup.py build_sphinx
 
 [testenv:cover]
-commands = python setup.py testr --coverage
+commands = python setup.py test --coverage --coverage-package-name=oslo_policy --testr-args='{posargs}'
 
 [flake8]
 # H803 skipped on purpose per list discussion.
@@ -45,4 +45,4 @@ import_exceptions = oslo_policy._i18n
 # this also means that pip-missing-reqs must be installed separately, outside
 # of the requirements.txt files
 deps = pip_missing_reqs
-commands = pip-missing-reqs -d --ignore-module=oslo_policy* --ignore-module=pkg_resources --ignore-file=oslo_policy/test.py --ignore-file=oslo_policy/tests/* oslo_policy
+commands = pip-missing-reqs -d --ignore-module=oslo_policy* --ignore-module=pkg_resources --ignore-file=oslo_policy/test.py --ignore-file=oslo_policy/tests/* oslo_policy