Delete corresponding networks during zone deletion.

server/src/com/cloud/configuration/ConfigurationManagerImpl.java

@@ -860,6 +860,14 @@ public class ConfigurationManagerImpl implements ConfigurationManager, Configura
     	try {
     	    // Delete vNet
             _zoneDao.deleteVnet(zoneId);
+            
+            //Delete networks
+            List<NetworkVO> networks = _networkDao.listByZone(zoneId);
+            if (networks != null && !networks.isEmpty()) {
+                for (NetworkVO network : networks) {
+                    _networkDao.remove(network.getId());
+                }
+            }
     	} catch (Exception ex) {
     	    s_logger.error("Failed to delete zone " + zoneId);
     	    throw new CloudRuntimeException("Failed to delete zone " + zoneId);

server/src/com/cloud/network/dao/NetworkDao.java

@@ -49,6 +49,8 @@ public interface NetworkDao extends GenericDao<NetworkVO, Long> {
     
     List<NetworkVO> listBy(long zoneId, String broadcastUri);
     
+    List<NetworkVO> listByZone(long zoneId);
+    
     void changeActiveNicsBy(long networkId, int nicsCount);
     
     int getActiveNicsIn(long networkId);

server/src/com/cloud/network/dao/NetworkDaoImpl.java

@@ -210,6 +210,13 @@ public class NetworkDaoImpl extends GenericDaoBase<NetworkVO, Long> implements N
         return search(sc, null);
     }
     
+    @Override
+    public List<NetworkVO> listByZone(long zoneId) {
+        SearchCriteria<NetworkVO> sc = ZoneBroadcastUriSearch.create();
+        sc.setParameters("dataCenterId", zoneId);
+        return search(sc, null);
+    }
+    
     @Override
     public void changeActiveNicsBy(long networkId, int count) {
         _opDao.changeActiveNicsBy(networkId, count);