Glare Work for Community App Catalog

We're going to try out glare for backing the app catalog v2.

Implement rallyci virsh provider for rally-ci

Implement Provider interface

Rally CI docs for rally-ci

Sphinx docs on readthedocs README.rst

Rally CI status web page for rally-ci

Real time Rally CI status page.

Fix context/admin_context in nova/tests/test_db_api for OpenStack Compute (nova)

Some methods in nova.db.sqlalchemy.api requires admin_context, some methods requires non admin context. Almost all tests in nova.tests.test_db_api uses admin_context, and there is no tests for context/admin_context difference. These tests should be implemented.