Fix devstack plugin for multinode deployment issues

- Call create_heat_accounts irrespective of whether keystone
is enabled or not.
- Use hardcoded auth_encryption_key

Change-Id: I03fab7f986ec2a9703044f4bff31d477e2e7fe6a

devstack/lib/heat

@@ -140,7 +140,9 @@ function configure_heat {
     fi
 
     iniset $HEAT_CONF database connection `database_connection_url heat`
-    iniset $HEAT_CONF DEFAULT auth_encryption_key $(generate_hex_string 16)
+    # we are using a hardcoded auth_encryption_key as it has to be the same for
+    # multinode deployment.
+    iniset $HEAT_CONF DEFAULT auth_encryption_key "767c3ed056cbaa3b9dfedb8c6f825bf0"
 
     iniset $HEAT_CONF DEFAULT region_name_for_services "$REGION_NAME"
 

devstack/plugin.sh

@@ -26,10 +26,7 @@ if is_heat_enabled; then
         cleanup_heat
         echo_summary "Configuring heat"
         configure_heat
-
-        if is_service_enabled key; then
-            create_heat_accounts
-        fi
+        create_heat_accounts
 
     elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
         # Initialize heat