void removeAllQuotas() throws Exception {
    final Connection conn = testUtil.getConnection();
    removeAllQuotas(conn);
    assertEquals(0, listNumDefinedQuotas(conn));
  }
Removes all quotas defined in the HBase quota table.
hbase-server/src/test/java/org/apache/hadoop/hbase/quotas/SpaceQuotaHelperForTests.java