[ONOS-7093] Add ISSU permissions

Change-Id: I9097019cf4b42d41817daafe3ce9ad8644ccb148
diff --git a/core/api/src/main/java/org/onosproject/security/AppPermission.java b/core/api/src/main/java/org/onosproject/security/AppPermission.java
index b79bc7e..c0f7fe9 100644
--- a/core/api/src/main/java/org/onosproject/security/AppPermission.java
+++ b/core/api/src/main/java/org/onosproject/security/AppPermission.java
@@ -82,7 +82,10 @@
         TUNNEL_WRITE,
         TUNNEL_EVENT,
         UI_READ,
-        UI_WRITE
+        UI_WRITE,
+        UPGRADE_READ,
+        UPGRADE_WRITE,
+        UPGRADE_EVENT
     }
 
     protected Type type;