TRAFODION-482: add support for sequence numbers can be closed

[Zhu, Wen-Jun]

Hi,

As trafodion support sequence now, the jira issue 482: add support for sequence 
numbers can be closed(https://issues.apache.org/jira/browse/TRAFODION-482) can 
be closed, right?

Regards,
Wenjun.Zhu