Add comparing PortRange in forwarding rules Equal function

This fixes bug in RBS that forwarding rule is not getting updated on
port updates

pkg/loadbalancers/forwarding_rules.go

@@ -423,6 +423,7 @@ func Equal(fr1, fr2 *composite.ForwardingRule) (bool, error) {
 		fr1.IPProtocol == fr2.IPProtocol &&
 		fr1.LoadBalancingScheme == fr2.LoadBalancingScheme &&
 		utils.EqualStringSets(fr1.Ports, fr2.Ports) &&
+		fr1.PortRange == fr2.PortRange &&
 		id1.Equal(id2) &&
 		fr1.AllowGlobalAccess == fr2.AllowGlobalAccess &&
 		fr1.AllPorts == fr2.AllPorts &&

pkg/loadbalancers/forwarding_rules_test.go

@@ -179,6 +179,23 @@ func TestForwardingRulesEqual(t *testing.T) {
 		},
 	}
 
+	frPortRange1 := &composite.ForwardingRule{
+		Name:                "tcp-fwd-rule",
+		IPAddress:           "10.0.0.0",
+		PortRange:           "2-3",
+		IPProtocol:          "TCP",
+		LoadBalancingScheme: string(cloud.SchemeInternal),
+		BackendService:      "http://www.googleapis.com/projects/test/regions/us-central1/backendServices/bs1",
+	}
+	frPortRange2 := &composite.ForwardingRule{
+		Name:                "tcp-fwd-rule",
+		IPAddress:           "10.0.0.0",
+		PortRange:           "1-2",
+		IPProtocol:          "TCP",
+		LoadBalancingScheme: string(cloud.SchemeInternal),
+		BackendService:      "http://www.googleapis.com/projects/test/regions/us-central1/backendServices/bs1",
+	}
+
 	for _, tc := range []struct {
 		desc       string
 		oldFwdRule *composite.ForwardingRule
@@ -227,6 +244,12 @@ func TestForwardingRulesEqual(t *testing.T) {
 			newFwdRule: fwdRules[7],
 			expect:     false,
 		},
+		{
+			desc:       "same forwarding rule, different port ranges",
+			oldFwdRule: frPortRange1,
+			newFwdRule: frPortRange2,
+			expect:     false,
+		},
 	} {
 		t.Run(tc.desc, func(t *testing.T) {
 			got, err := Equal(tc.oldFwdRule, tc.newFwdRule)