isolation2: For utiltiy mode use content-id instead of dbid.
isolation2: For utiltiy mode use content-id instead of dbid.

dbid is not consistent (like content 0 mirror will always have dbid 5), as
segments get created in parallel and get assigned those based on order of
execution. Hence better convention to use is content-id, to specify which
segment to connect. Framework currently connects to primary of specified
content-id.

If later needed, maybe when we enable hot-standby feature can extend further to
start supporting connecting to specified content-ids mirror as well. Not
something needed as of now.

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