Centralize setting internal_protocol

Internal Openstack APIs may be encrypted with https. This patch
centralize setting internal API protocol among services by
setting one of depending if cluster or single models are used:
  cluster_internal_protocol: 'https'
  internal_protocol: 'https'

Change-Id: I2baff79cd5851678559d7de47460fdd2031f70ee
diff --git a/neutron/control/openvswitch/cluster.yml b/neutron/control/openvswitch/cluster.yml
index ca2e066..3f80a55 100644
--- a/neutron/control/openvswitch/cluster.yml
+++ b/neutron/control/openvswitch/cluster.yml
@@ -14,6 +14,7 @@
     neutron_enable_vlan_aware_vms: False
     neutron_enable_bgp_vpn: False
     neutron_bgp_vpn_driver: bagpipe
+    cluster_internal_protocol: 'http'
   neutron:
     server:
       global_physnet_mtu: ${_param:neutron_global_physnet_mtu}
@@ -37,6 +38,7 @@
         host: ${_param:openstack_database_address}
       identity:
         region: ${_param:openstack_region}
+        protocol: ${_param:cluster_internal_protocol}
       message_queue:
         members:
           - host: ${_param:openstack_message_queue_node01_address}