private HRegionServer mockRegionServer(Configuration conf) {
    HRegionServer rs = mock(HRegionServer.class);
    when(rs.getConfiguration()).thenReturn(conf);
    return rs;
  }
Creates an HBase Configuration object for the default values.
hbase-server/src/test/java/org/apache/hadoop/hbase/quotas/TestRegionSizeReportingChore.java