Align to openstack python package index mirror

Some modules we developed will not be updated to pypi in time, meanwhile,
jenkins will poll packages from openstack mirror, so it is worth to be
set as default index in tox.

User can use -i option in tox cli to change default index server to any
popular or his favorite.

Change-Id: I4449f9b6861a327cf2fd888205843b51a57dcd2f
Closes-Bug: #1289121
Add new 'storage': {'production_ready': True} capability

This capability is needed to be used in the Tempest tests
to have the difference between Icehouse version (where tests
won't pass due to *really* huge running time) and new Juno
version, where this performance issue has been fixed.

Change-Id: I83bf184a58bfba0e48e09a754237a8b0a4dceb25
Merge "Add new 'storage': {'production_ready': True} capability"
Merge "Align to openstack python package index mirror"