Add openstack_node_role parameter

Add openstack_node_role parameter that will specify node role
primary|secondary. This metadata will be used by formulas as a
trigger to run one-shot operations.

Change-Id: I230590bc5f9d53960c6edaf7e37c44541d9c3342
Related-Prod: PROD-21267
diff --git a/keystone/server/single.yml b/keystone/server/single.yml
index 16c26ca..2b1e89e 100644
--- a/keystone/server/single.yml
+++ b/keystone/server/single.yml
@@ -8,6 +8,7 @@
     mysql_admin_password: password
     mysql_keystone_password: password
     keystone_tokens_expiration: 3600
+    openstack_node_role: primary
   linux:
     system:
       package:
@@ -24,6 +25,7 @@
       admin_name: admin
       admin_password: ${_param:keystone_admin_password}
       admin_email: ${_param:admin_email}
+      role: ${_param:openstack_node_role}
       bind:
         address: ${_param:single_address}
         private_address: ${_param:single_address}