make python-keystoneclient configurable via devstack, remove pip requirement for horizon.

 * Update to use https://github.com/openstack/python-keystoneclient

Change-Id: I54c1ba7fe11de9a6a8f53bdfe8b1c0bd2f5b8f58
diff --git a/stackrc b/stackrc
index 0e700d5..2d5079f 100644
--- a/stackrc
+++ b/stackrc
@@ -30,6 +30,10 @@
 NOVACLIENT_REPO=https://github.com/openstack/python-novaclient.git
 NOVACLIENT_BRANCH=master
 
+# python keystone client library to nova that horizon uses
+KEYSTONECLIENT_REPO=https://github.com/openstack/python-keystoneclient
+KEYSTONECLIENT_BRANCH=master
+
 # openstackx is a collection of extensions to openstack.compute & nova
 # that is *deprecated*.  The code is being moved into python-novaclient & nova.
 OPENSTACKX_REPO=https://github.com/cloudbuilders/openstackx.git