CSTACKEX-246: small fix

Author: sathvikaragi

plugins/storage/volume/ontap/src/main/java/org/apache/cloudstack/storage/driver/OntapPrimaryDatastoreDriver.java

@@ -990,7 +990,7 @@ private String buildSnapshotName(String cloudStackSnapshotName, long snapshotId)
 
     private Storage.ImageFormat getImageFormatByHypervisorAndProtocol(HypervisorType hypervisorType, String protocol) {
         if (HypervisorType.KVM.equals(hypervisorType)) {
-            ProtocolType protocolType = ProtocolType.valueOf(protocol.toUpperCase());
+            ProtocolType protocolType = ProtocolType.valueOf(protocol);
             switch (protocolType) {
                 case NFS3:
                     return Storage.ImageFormat.QCOW2;