IGNITE-3963 FlinkIgniteSinkSelfTest fails with exception IllegalArgumentException

[Saikat Maitra-2]

Hi,

I have raised PR[1] for the following jira ticket[2].

Please review and let me know if any changes required.

Regards,
Saikat

[1] *https://github.com/apache/ignite/pull/1112
<https://github.com/apache/ignite/pull/1112>*
[2] *https://issues.apache.org/jira/browse/IGNITE-3963
<https://issues.apache.org/jira/browse/IGNITE-3963>*