when locate meta region, we should respect the param "useCache" passed in on 0.98

    private HRegionLocation locateRegionInMeta(final TableName parentTable,
      final TableName tableName, final byte [] row, boolean useCache,
      Object regionLockObject, boolean retry)
    throws IOException {
      ......
      for (int tries = 0; true; tries++) {
       .....
        HRegionLocation metaLocation = null;
        try {
          // locate the meta region
          metaLocation = locateRegion(parentTable, metaKey, true, false); //NOTICE: we should honor the "useCache" passed in when locate the meta region.
          ....
      }
    }