JDBC ResultSet .wasNull

[jiazhili-dawnlight]

wasNull was called By Java ORM Framework ，but not support version 0.10.0 .

Just call IoTDBRpcDataSet.isNull in method ResultSet.WasNull ?

[jixuan1989]

we have created an issue for this method. Will update the progress when finished.
https://issues.apache.org/jira/browse/IOTDB-912

[HTHou]

This issue has be fixed by PR #1791, please check it. The next release version will support the method.