public void preEnableTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
      TableName tablName) throws IOException {
    }
ObsoleteMethod coprocessor implements preCreateTable method which has HRegionInfo parameters.
In our current implementation, we pass only RegionInfo parameters, so this method won't be
called by HBase at all.
hbase-server/src/test/java/org/apache/hadoop/hbase/tool/coprocessor/CoprocessorValidatorTest.java