Call removeGroup instead of removeTunnel when removing tunnel

Change-Id: I51bc873ebd4d9ec367400a7e18d196ba22e05ebe
diff --git a/src/main/java/net/onrc/onos/apps/segmentrouting/SegmentRoutingManager.java b/src/main/java/net/onrc/onos/apps/segmentrouting/SegmentRoutingManager.java
index e300ee2..f352e43 100644
--- a/src/main/java/net/onrc/onos/apps/segmentrouting/SegmentRoutingManager.java
+++ b/src/main/java/net/onrc/onos/apps/segmentrouting/SegmentRoutingManager.java
@@ -1665,7 +1665,7 @@
                 return false;
             }
             else {
-                sw13.removeTunnel(tunnelId);
+                sw13.removeGroup(route.getGroupId());
             }
         }