Changing access specifier from private to protetcted for dataDir and …

…propertyStore to allow access from subclasses

pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/PinotHelixResourceManager.java

@@ -215,7 +215,7 @@ private enum LineageUpdateType {
 
   private final String _helixZkURL;
   private final String _helixClusterName;
-  private final String _dataDir;
+  protected final String _dataDir;
   private final boolean _isSingleTenantCluster;
   private final boolean _enableBatchMessageMode;
   private final int _deletedSegmentsRetentionInDays;