protected void setViewDataMigrationUtility(ViewDataMigrationUtility viewDataMigrationUtility) {
    this.viewDataMigrationUtility = viewDataMigrationUtility;
  }
From all extracted views in the work directory finds ones that are present only in
extracted version (not registered in the registry during startup).
If jar is not exists, that means that this view is previous version of view.
Finds latest between unregistered instances and returns it.

@param serverVersion server version
@param instance      view instance entity
@return latest unregistered instance of same name of same view.
ambari-server/src/main/java/org/apache/ambari/server/view/ViewRegistry.java