support installing django_openstack_auth from pypi

Part of the libs from pypi conversion, convert django_openstack_auth
to this format.

Change-Id: I97c8ea19d8aed1e0bdd62c06cfadd1d616573d76
diff --git a/stackrc b/stackrc
index 75f606f..a404ad8 100644
--- a/stackrc
+++ b/stackrc
@@ -350,8 +350,8 @@
 HEAT_TEMPLATES_BRANCH=${HEAT_TEMPLATES_BRANCH:-master}
 
 # django openstack_auth library
-HORIZONAUTH_REPO=${HORIZONAUTH_REPO:-${GIT_BASE}/openstack/django_openstack_auth.git}
-HORIZONAUTH_BRANCH=${HORIZONAUTH_BRANCH:-master}
+GITREPO["django_openstack_auth"]=${HORIZONAUTH_REPO:-${GIT_BASE}/openstack/django_openstack_auth.git}
+GITBRANCH["django_openstack_auth"]=${HORIZONAUTH_BRANCH:-master}
 
 # keystone middleware
 KEYSTONEMIDDLEWARE_REPO=${KEYSTONEMIDDLEWARE_REPO:-${GIT_BASE}/openstack/keystonemiddleware.git}