Hide systemdata in output table

Author: Chenglong Liu

src/Cdn/Cdn.Autorest/README.md

@@ -98,6 +98,18 @@ directive:
     - DeliveryRuleRequestHeaderAction
     - DeliveryRuleResponseHeaderAction
 
+  - where:
+      model-name: .*
+    set:
+      format-table:
+        exclude-properties:
+          - SystemData
+          - SystemDataCreatedAt
+          - SystemDataCreatedBy
+          - SystemDataCreatedByType
+          - SystemDataLastModifiedAt
+          - SystemDataLastModifiedByType
+          
   # Following is two common directive which are normally required in all the RPs
   # 1. Remove the unexpanded parameter set
   # 2. For New-* cmdlets, ViaIdentity is not required, so CreateViaIdentityExpanded is removed as well