Record event when EgressIP remains unassigned

Modified the code to record an event for case, when an egressIP is
unassigned from a node and is not assigned to any other node.

Signed-off-by: Pulkit Jain <jainpu@vmware.com>

pkg/agent/controller/egress/egress_controller.go

@@ -1168,10 +1168,16 @@ func (c *EgressController) uninstallEgress(egressName string, eState *egressStat
 			return err
 		}
 	}
+	// Fetch the egress object to record the event.
+	egress, _ := c.egressLister.Get(egressName)
 	// Unassign the Egress IP from the local Node if it was assigned by the agent.
-	if _, err := c.ipAssigner.UnassignIP(eState.egressIP); err != nil {
+	unassigned, err := c.ipAssigner.UnassignIP(eState.egressIP)
+	if err != nil {
 		return err
 	}
+	if unassigned {
+		c.record.Eventf(egress, corev1.EventTypeNormal, "IPUnassigned", "Unassigned Egress %s with IP %s from Node %s", egress.Name, eState.egressIP, c.nodeName)
+	}
 	// Remove the Egress's state.
 	c.deleteEgressState(egressName)
 	return nil