Fix NPE of P4Runtime device when deleting a group

Change-Id: I98b87beddc6b1b7afec537d4d618185006c31aeb
diff --git a/drivers/p4runtime/src/main/java/org/onosproject/drivers/p4runtime/P4RuntimeActionGroupProgrammable.java b/drivers/p4runtime/src/main/java/org/onosproject/drivers/p4runtime/P4RuntimeActionGroupProgrammable.java
index 612394f..97a721b 100644
--- a/drivers/p4runtime/src/main/java/org/onosproject/drivers/p4runtime/P4RuntimeActionGroupProgrammable.java
+++ b/drivers/p4runtime/src/main/java/org/onosproject/drivers/p4runtime/P4RuntimeActionGroupProgrammable.java
@@ -112,8 +112,8 @@
                         return;
                     }
                     GroupDescription groupDesc = new DefaultGroupDescription(
-                            deviceId, op.groupType(), op.buckets(), groupOnStore.appCookie(),
-                            op.groupId().id(), groupOnStore.appId());
+                            deviceId, groupOnStore.type(), groupOnStore.buckets(), groupOnStore.appCookie(),
+                            groupOnStore.id().id(), groupOnStore.appId());
                     DefaultGroup groupToApply = new DefaultGroup(op.groupId(), groupDesc);
                     processPdGroup(groupToApply, op.opType());
                 });