Add console script entry point for solum
Add console script entry point for solum

This patch allows solumclient/solum.py script to be executed by invoking
solum command.

Change-Id: I4a576191edf0b0406b91f974bbc8bf8e52a71d30

rackerlabs/arborlabs_client,stackforge/python-solumclient,openstack/python-solumclient,rackerlabs/arborlabs_client,ed-/python-solumclient,ed-/python-solumclient,stackforge/python-solumclient