Update 11198

Author: weizhouapache

plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/storage/KVMStorageProcessor.java

@@ -582,7 +582,7 @@ public Answer copyVolumeFromPrimaryToSecondary(final CopyCommand cmd) {
         try {
             final String volumeName = UUID.randomUUID().toString();
 
-            final String destVolumeName = volumeName + "." + destFormat.getFileExtension();
+            final String destVolumeName = volumeName + "." + ImageFormat.QCOW2.getFileExtension();
             final KVMPhysicalDisk volume = storagePoolMgr.getPhysicalDisk(primaryStore.getPoolType(), primaryStore.getUuid(), srcVolumePath);
             volume.setFormat(PhysicalDiskFormat.valueOf(srcFormat.toString()));