Change designer to plugin in code

Changed all the use of the designer configuration in the code to be plugin

Change-Id: Id9792cbd4fb9385446780c28fb7fb5418772acf6
Issue-ID: SDC-974
Signed-off-by: Idan Amit <ia096e@intl.att.com>
diff --git a/catalog-ui/src/app/models/app-config.ts b/catalog-ui/src/app/models/app-config.ts
index 556603d..1f6682f 100644
--- a/catalog-ui/src/app/models/app-config.ts
+++ b/catalog-ui/src/app/models/app-config.ts
@@ -53,7 +53,7 @@
     GET_resource_artifact_types:string;
     GET_activity_log:string;
     GET_configuration_ui:string;
-    GET_designers_configuration:string;
+    GET_plugins_configuration:string;
     GET_service:string;
     GET_ecomp_menu_items:string;
     GET_service_validate_name:string;