Add oslo-templates formula to openstack salt formulas

Starting from Queens release all openstack formulas directly
dependent on salt-formula-oslo-template. This patch adds
oslo-templates to openstack formulas list directly.

Change-Id: I8eed9d0e5f1afd35db51d611dda50d899460324f
diff --git a/salt/master/formula/pkg/openstack.yml b/salt/master/formula/pkg/openstack.yml
index 3d22c41..381ae1a 100644
--- a/salt/master/formula/pkg/openstack.yml
+++ b/salt/master/formula/pkg/openstack.yml
@@ -76,6 +76,9 @@
             octavia:
               source: pkg
               name: salt-formula-octavia
+            oslo_templates:
+              source: pkg
+              name: salt-formula-oslo-templates
             opencontrail:
               source: pkg
               name: salt-formula-opencontrail