CLOUDSTACK-3463: [Portable IP] [EIP/ELB Zone] EIP semantics are not

intact with portable IP

fix ensures that, on release of portable IP associated with 'EIP
enabled' basic zone vm, a new system public IP is allocated and
associated with the VM

server/src/com/cloud/network/NetworkServiceImpl.java

@@ -903,9 +903,6 @@ public class NetworkServiceImpl extends ManagerBase implements  NetworkService {
         boolean success = _networkMgr.disassociatePublicIpAddress(ipAddressId, userId, caller);
 
         if (success) {
-            if (ipVO.isPortable()) {
-                return success;
-            }
             Long networkId = ipVO.getAssociatedWithNetworkId();
             if (networkId != null) {
                 Network guestNetwork = getNetwork(networkId);