Cluster attributes list synchronized with actual Nailgun attributes
PostgreSQL setup provided by the OpenStack infra is used.
When a development environment is under a proxy, tox is failed even if
environment variables of the proxy are set.
This patch fixes this problem.
We have 3 services: analytics, collector, migration.
Migration is frozen and going to be removed. Also
migration requires Elasticsearch server for tests,
thus it can't be tested on OpenStack CI.
Pep8 checked on all services.
Project works only on python2.7, thus
gate-fuel-stats-python26 should be removed.