vmware: fix NPE for volume migration CLUSTER to ZONE-wide pool (apache#5582)

Scope type of source pool is passed in the method, incorrectly, instead of the target pool.

Signed-off-by: Abhishek Kumar <abhishek.mrt22@gmail.com>
(cherry picked from commit 330e8e6)
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Author: shwstppr

plugins/hypervisors/vmware/src/main/java/org/apache/cloudstack/storage/motion/VmwareStorageMotionStrategy.java

@@ -179,7 +179,7 @@ private Pair<Long, String> getHostIdForVmAndHostGuidInTargetClusterForWorkerVm(S
             if (hostId == null) {
                 throw new CloudRuntimeException("Offline Migration failed, unable to find suitable host for worker VM placement in the cluster of storage pool: " + sourcePool.getName());
             }
-            hostGuidInTargetCluster = getHostGuidInTargetCluster(sourcePool.getClusterId(), targetPool, sourceScopeType);
+            hostGuidInTargetCluster = getHostGuidInTargetCluster(sourcePool.getClusterId(), targetPool, targetScopeType);
         } else if (ScopeType.CLUSTER.equals(targetScopeType)) {
             hostId = findSuitableHostIdForWorkerVmPlacement(targetPool.getClusterId());
             if (hostId == null) {