Fix network guest types support

Author: nvazquez

plugins/network-elements/nicira-nvp/src/main/java/com/cloud/network/guru/NiciraNvpGuestNetworkGuru.java

@@ -113,14 +113,23 @@ public NiciraNvpGuestNetworkGuru() {
     protected boolean canHandle(final NetworkOffering offering, final NetworkType networkType, final PhysicalNetwork physicalNetwork) {
         // This guru handles only Guest Isolated network that supports Source nat service
         if (networkType == NetworkType.Advanced && isMyTrafficType(offering.getTrafficType())
-                && (offering.getGuestType() == Network.GuestType.Isolated || offering.getGuestType() == Network.GuestType.Shared)
+                && supportedGuestTypes(offering, Network.GuestType.Isolated, Network.GuestType.Shared)
                 && isMyIsolationMethod(physicalNetwork) && ntwkOfferingSrvcDao.areServicesSupportedByNetworkOffering(offering.getId(), Service.Connectivity)) {
             return true;
         } else {
             return false;
         }
     }
 
+    private boolean supportedGuestTypes(NetworkOffering offering, GuestType... types) {
+        for (GuestType guestType : types) {
+            if (offering.getGuestType().equals(guestType)){
+                return true;
+            }
+        }
+        return false;
+    }
+
     @Override
     public Network design(final NetworkOffering offering, final DeploymentPlan plan, final Network userSpecified, final Account owner) {
         // Check of the isolation type of the related physical network is supported