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/utils/constants.ts b/catalog-ui/src/app/utils/constants.ts
index c04da62..ea0848e 100644
--- a/catalog-ui/src/app/utils/constants.ts
+++ b/catalog-ui/src/app/utils/constants.ts
@@ -239,7 +239,7 @@
     public static WORKSPACE_DISTRIBUTION = 'workspace.distribution';
     public static WORKSPACE_PROPERTIES_ASSIGNMENT = 'workspace.properties_assignment';
     public static WORKSPACE_REQUIREMENTS_AND_CAPABILITIES = 'workspace.reqAndCap';
-    public static WORKSPACE_DESIGNERS = 'workspace.designers';
+    public static WORKSPACE_PLUGINS = 'workspace.plugins';
     public static WORKSPACE_NG2 = 'workspace.ng2';
 }