bugfix: ZENKO-623 Add getDataStoreType method

lib/models/ObjectMDLocation.js

@@ -14,6 +14,7 @@ class ObjectMDLocation {
      * @param {string} locationObj.dataStoreName - type of data store
      * @param {string} locationObj.dataStoreETag - internal ETag of
      *   data part
+     * @param {string} locationObj.dataStoreType - external location of data
      */
     constructor(locationObj) {
         this._data = {
@@ -22,6 +23,7 @@ class ObjectMDLocation {
             size: locationObj.size,
             dataStoreName: locationObj.dataStoreName,
             dataStoreETag: locationObj.dataStoreETag,
+            dataStoreType: locationObj.dataStoreType,
         };
     }
 
@@ -64,6 +66,10 @@ class ObjectMDLocation {
         return this;
     }
 
+    getDataStoreType() {
+        return this._data.dataStoreType;
+    }
+
     getValue() {
         return this._data;
     }