Massive refactoring to the troveclient

The new client adheres to the standards of the other clients
now. It prints out tables, uses ENVVAR's for auth, no longer
stores pickled json in a login token, uses openstack common,
and moves the cli operations into a v1 module for the future
of trove when it has a v2 api.

Please note for compatibility, the troveclient.compat module
has the old cli. In order to deploy it, amend the setup.cfg
to include the compat module.

implements blueprint cli-compliance-upgrade

Change-Id: Ie69d9dbc75ce90496da316244c97acca1877a327
Tweak pbr conf

Mainly, remove the pin in setup.py and remove the hook entry in
setup.cfg. Update from requirements while we're at it.

Change-Id: I34a05229b9ea0bdfd99dc16d09713c9494c1cb78
Add support for a service type env var

Rackspace is currently setting their service types to weird things.
Support them, because we love special snowflakes.

Change-Id: I1519be00a3086945338a953bc2a1e7a4e0e65400