@Override
  public EnableCatalogJanitorResponse enableCatalogJanitor(RpcController c,
    EnableCatalogJanitorRequest req) throws ServiceException {
    rpcPreCheck("enableCatalogJanitor");
    return EnableCatalogJanitorResponse.newBuilder()
      .setPrevValue(server.catalogJanitorChore.setEnabled(req.getEnable())).build();
  }
Execute Delete Snapshot operation.
@return DeleteSnapshotResponse (a protobuf wrapped void) if the snapshot existed and was
        deleted properly.
@throws ServiceException wrapping SnapshotDoesNotExistException if specified snapshot did not
                         exist.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterRpcServices.java