Allow setting protocol for internal endpoints

This patch unhardcode protocol on internal endpoints in
keystone.client classes. It may be changed by setting
{service_name}_internal_protocol param on cluster level.

Change-Id: I37f75003f1a30aa8fb944a84f1a7fa603ca1f725
Related-Prod: PROD-17043
diff --git a/keystone/client/image_manager.yml b/keystone/client/image_manager.yml
index 024b0c4..becd512 100644
--- a/keystone/client/image_manager.yml
+++ b/keystone/client/image_manager.yml
@@ -1,6 +1,7 @@
 parameters:
   _param:
     keystone_image_manager_email: 'root@localhost'
+    keystone_service_protocol: http
   keystone:
     client:
       enabled: true
@@ -10,6 +11,7 @@
             host: ${_param:keystone_service_host}
             port: 35357
             token: ${_param:keystone_service_token}
+            protocol: ${_param:keystone_service_protocol}
           roles:
           - image_manager
           project: