Support LB in kubevirt networking application.

Change-Id: I59578fc0b778173a20c958b641cf9bf1abe69bc6
(cherry picked from commit c8a8759e3adc292a429a4ca7173d15c220b7ea3c)
diff --git a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/DefaultKubevirtLoadBalancerRule.java b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/DefaultKubevirtLoadBalancerRule.java
index 453610e..bd2f64a 100644
--- a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/DefaultKubevirtLoadBalancerRule.java
+++ b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/DefaultKubevirtLoadBalancerRule.java
@@ -26,6 +26,7 @@
  */
 public final class DefaultKubevirtLoadBalancerRule implements KubevirtLoadBalancerRule {
     private static final String NOT_NULL_MSG = "Load Balancer Rule % cannot be null";
+    private static final String ICMP = "ICMP";
 
     private final String protocol;
     private final Integer portRangeMax;
@@ -70,9 +71,10 @@
             return false;
         }
         DefaultKubevirtLoadBalancerRule that = (DefaultKubevirtLoadBalancerRule) o;
+
         return protocol.equals(that.protocol) &&
-                portRangeMax.equals(that.portRangeMax) &&
-                portRangeMin.equals(that.portRangeMin);
+                Objects.equals(portRangeMax, that.portRangeMax) &&
+                Objects.equals(portRangeMin, that.portRangeMin);
     }
 
     @Override
@@ -107,9 +109,11 @@
         @Override
         public KubevirtLoadBalancerRule build() {
             checkArgument(protocol != null, NOT_NULL_MSG, "protocol");
-            checkArgument(portRangeMax != null, NOT_NULL_MSG, "portRangeMax");
-            checkArgument(portRangeMin != null, NOT_NULL_MSG, "portRangeMin");
 
+            if (!protocol.equalsIgnoreCase(ICMP)) {
+                checkArgument(portRangeMax != null, NOT_NULL_MSG, "portRangeMax");
+                checkArgument(portRangeMin != null, NOT_NULL_MSG, "portRangeMin");
+            }
             return new DefaultKubevirtLoadBalancerRule(protocol, portRangeMax, portRangeMin);
         }