CLOUDSTACK-8198: Use random local storage UUID

Earlier host addition of multiple hosts with local storage failed due to
same local storage UUID being used where the storage path is same.

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java

@@ -785,7 +785,7 @@ public class LibvirtComputingResource extends ServerResourceBase implements Serv
 
         _localStorageUUID = (String)params.get("local.storage.uuid");
         if (_localStorageUUID == null) {
-            _localStorageUUID = UUID.nameUUIDFromBytes(_localStoragePath.getBytes()).toString();
+            _localStorageUUID = UUID.randomUUID().toString();
         }
 
         value = (String)params.get("scripts.timeout");