Configure auth via conf file, not paste file

The paste file now lives in /usr/share, and shouldn't be
modified.  Configure the keystone auth token settings in
trove.conf instead.

Change-Id: Ib2cc2211cc645ad71e9f57c1c52177074472afcb
Set control_exchange in the main config file

`control_exchange = trove` should be set in the main config file.

Change-Id: I559f440a2aed76968bcdce18384f8707febb1f21
Support Neutron

The network driver and network label regex need to be set properly
for neutron to work.

Change-Id: I9e24ea252f434209ebc2fce89727db9bae2d1c1e