Install python-senlinclient using pip by default
Install python-senlinclient using pip by default

After we have a release of python-senlinclient, we should install
it using pip by default.

Change-Id: Icdd8d26acc22f70c9abe99e31932e57b76e1c6eb

stackforge/senlin,openstack/senlin,Alzon/senlin,openstack/senlin,tengqm/senlin-container,openstack/senlin,Alzon/senlin,tengqm/senlin-container,stackforge/senlin