CORD-48 Implementation of hashing Next Objective in OF-DPA driver. Major changes to ensure multi-ONOS-instance group-chain installation.
Also includes:
     Changes to Next Objective that adds metadata field for applications to optionally send auxillary info to drivers
     Changes to Next Objective that allows more explicit modification of the next objective
     Changes to Forwarding Objective and PendingNext to include hashCode() and equals() method
     MplsBosInstruction included in kryo serializer
     GroupKey's byte[] represented as a hex string
     Bug fix in mpls flow installation to report failure in install
     Bug fix in linkUp in SR app to disallow non-masters to modify groups
     Bug fix in ordering of actions in group

Change-Id: I3e7003f55724c2de79589e43e11d05ff4815a81d
diff --git a/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/DefaultRoutingHandler.java b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/DefaultRoutingHandler.java
index a737339..9922587 100644
--- a/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/DefaultRoutingHandler.java
+++ b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/DefaultRoutingHandler.java
@@ -448,7 +448,6 @@
         if (nextHops.isEmpty()) {
             nextHops.add(destSw);
         }
-
         // If both target switch and dest switch are edge routers, then set IP
         // rule for both subnet and router IP.
         boolean targetIsEdge;
@@ -467,7 +466,7 @@
         if (targetIsEdge && destIsEdge) {
             Set<Ip4Prefix> subnets = config.getSubnets(destSw);
             log.debug("* populateEcmpRoutingRulePartial in device {} towards {} for subnets {}",
-                    targetSw, destSw, subnets);
+                      targetSw, destSw, subnets);
             result = rulePopulator.populateIpRuleForSubnet(targetSw,
                                                            subnets,
                                                            destSw,
@@ -479,24 +478,23 @@
             Ip4Address routerIp = destRouterIp;
             IpPrefix routerIpPrefix = IpPrefix.valueOf(routerIp, IpPrefix.MAX_INET_MASK_LENGTH);
             log.debug("* populateEcmpRoutingRulePartial in device {} towards {} for router IP {}",
-                    targetSw, destSw, routerIpPrefix);
+                      targetSw, destSw, routerIpPrefix);
             result = rulePopulator.populateIpRuleForRouter(targetSw, routerIpPrefix, destSw, nextHops);
             if (!result) {
                 return false;
             }
 
-        // If the target switch is an edge router, then set IP rules for the router IP.
         } else if (targetIsEdge) {
+            // If the target switch is an edge router, then set IP rules for the router IP.
             Ip4Address routerIp = destRouterIp;
             IpPrefix routerIpPrefix = IpPrefix.valueOf(routerIp, IpPrefix.MAX_INET_MASK_LENGTH);
             log.debug("* populateEcmpRoutingRulePartial in device {} towards {} for router IP {}",
-                    targetSw, destSw, routerIpPrefix);
+                      targetSw, destSw, routerIpPrefix);
             result = rulePopulator.populateIpRuleForRouter(targetSw, routerIpPrefix, destSw, nextHops);
             if (!result) {
                 return false;
             }
         }
-
         // Populates MPLS rules to all routers
         log.debug("* populateEcmpRoutingRulePartial in device{} towards {} for all MPLS rules",
                 targetSw, destSw);
@@ -504,7 +502,6 @@
         if (!result) {
             return false;
         }
-
         return true;
     }