Disable gp_replica_check for sequences.
Disable gp_replica_check for sequences.

There are some "known" differences that are currently not masked out.
I think the 'last_value' field is WAL-logged to a higher value than what's
written to disk in the master.

This was not visible before, when the demo cluster didn't have a standby
for the QD node. In QE nodes, sequences are not used.

jmcatamney/gpdb,greenplum-db/gpdb,xinzweb/gpdb,50wu/gpdb,50wu/gpdb,xinzweb/gpdb,Chibin/gpdb,ashwinstar/gpdb,Chibin/gpdb,ashwinstar/gpdb,Chibin/gpdb,adam8157/gpdb,Chibin/gpdb,adam8157/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,lisakowen/gpdb,50wu/gpdb,greenplum-db/gpdb,jmcatamney/gpdb,Chibin/gpdb,ashwinstar/gpdb,Chibin/gpdb,xinzweb/gpdb,ashwinstar/gpdb,50wu/gpdb,greenplum-db/gpdb,adam8157/gpdb,50wu/gpdb,50wu/gpdb,lisakowen/gpdb,lisakowen/gpdb,jmcatamney/gpdb,lisakowen/gpdb,ashwinstar/gpdb,lisakowen/gpdb,50wu/gpdb,adam8157/gpdb,adam8157/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,Chibin/gpdb,ashwinstar/gpdb,xinzweb/gpdb,Chibin/gpdb,ashwinstar/gpdb,Chibin/gpdb,adam8157/gpdb,xinzweb/gpdb,adam8157/gpdb,lisakowen/gpdb,50wu/gpdb,greenplum-db/gpdb,Chibin/gpdb,xinzweb/gpdb,lisakowen/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,greenplum-db/gpdb,adam8157/gpdb,xinzweb/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,lisakowen/gpdb,xinzweb/gpdb