Quick hack to make the VXID of a prepared transaction be -1/XID, so that different prepared xacts can be told apart in the pg_locks view.  Per suggestion from Florian.
Quick hack to make the VXID of a prepared transaction be -1/XID,
so that different prepared xacts can be told apart in the pg_locks
view.  Per suggestion from Florian.

edespino/gpdb,janebeckman/gpdb,royc1/gpdb,zaksoup/gpdb,zaksoup/gpdb,Chibin/gpdb,Quikling/gpdb,lintzc/gpdb,edespino/gpdb,janebeckman/gpdb,pavanvd/postgres-xl,zeroae/postgres-xl,tpostgres-projects/tPostgres,yuanzhao/gpdb,kaknikhil/gpdb,arcivanov/postgres-xl,0x0FFF/gpdb,jmcatamney/gpdb,lisakowen/gpdb,ashwinstar/gpdb,snaga/postgres-xl,tpostgres-projects/tPostgres,postmind-net/postgres-xl,oberstet/postgres-xl,Chibin/gpdb,pavanvd/postgres-xl,yuanzhao/gpdb,50wu/gpdb,Quikling/gpdb,kmjungersen/PostgresXL,50wu/gpdb,xuegang/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,kaknikhil/gpdb,techdragon/Postgres-XL,cjcjameson/gpdb,xuegang/gpdb,CraigHarris/gpdb,0x0FFF/gpdb,kaknikhil/gpdb,postmind-net/postgres-xl,zaksoup/gpdb,kaknikhil/gpdb,Quikling/gpdb,CraigHarris/gpdb,xinzweb/gpdb,rvs/gpdb,ahachete/gpdb,yazun/postgres-xl,janebeckman/gpdb,greenplum-db/gpdb,jmcatamney/gpdb,edespino/gpdb,greenplum-db/gpdb,jmcatamney/gpdb,ovr/postgres-xl,xuegang/gpdb,CraigHarris/gpdb,yuanzhao/gpdb,lisakowen/gpdb,pavanvd/postgres-xl,snaga/postgres-xl,yuanzhao/gpdb,Chibin/gpdb,lintzc/gpdb,ovr/postgres-xl,ovr/postgres-xl,adam8157/gpdb,Chibin/gpdb,Quikling/gpdb,lisakowen/gpdb,xuegang/gpdb,50wu/gpdb,tpostgres-projects/tPostgres,ashwinstar/gpdb,kaknikhil/gpdb,ahachete/gpdb,chrishajas/gpdb,greenplum-db/gpdb,tpostgres-projects/tPostgres,ahachete/gpdb,cjcjameson/gpdb,oberstet/postgres-xl,zaksoup/gpdb,adam8157/gpdb,ahachete/gpdb,yazun/postgres-xl,lisakowen/gpdb,Quikling/gpdb,janebeckman/gpdb,royc1/gpdb,rvs/gpdb,edespino/gpdb,lisakowen/gpdb,postmind-net/postgres-xl,yazun/postgres-xl,ashwinstar/gpdb,xuegang/gpdb,xinzweb/gpdb,kaknikhil/gpdb,zeroae/postgres-xl,Postgres-XL/Postgres-XL,ashwinstar/gpdb,greenplum-db/gpdb,edespino/gpdb,tpostgres-projects/tPostgres,kmjungersen/PostgresXL,ashwinstar/gpdb,xuegang/gpdb,yuanzhao/gpdb,CraigHarris/gpdb,royc1/gpdb,chrishajas/gpdb,arcivanov/postgres-xl,oberstet/postgres-xl,Quikling/gpdb,ovr/postgres-xl,adam8157/gpdb,arcivanov/postgres-xl,lintzc/gpdb,50wu/gpdb,cjcjameson/gpdb,xinzweb/gpdb,royc1/gpdb,techdragon/Postgres-XL,yazun/postgres-xl,adam8157/gpdb,edespino/gpdb,CraigHarris/gpdb,adam8157/gpdb,greenplum-db/gpdb,chrishajas/gpdb,lisakowen/gpdb,lintzc/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,xuegang/gpdb,cjcjameson/gpdb,snaga/postgres-xl,royc1/gpdb,cjcjameson/gpdb,ahachete/gpdb,jmcatamney/gpdb,0x0FFF/gpdb,techdragon/Postgres-XL,kmjungersen/PostgresXL,Quikling/gpdb,50wu/gpdb,cjcjameson/gpdb,techdragon/Postgres-XL,oberstet/postgres-xl,50wu/gpdb,yuanzhao/gpdb,Postgres-XL/Postgres-XL,ahachete/gpdb,zeroae/postgres-xl,snaga/postgres-xl,lintzc/gpdb,50wu/gpdb,Chibin/gpdb,pavanvd/postgres-xl,yuanzhao/gpdb,xuegang/gpdb,rvs/gpdb,xinzweb/gpdb,kaknikhil/gpdb,kmjungersen/PostgresXL,ashwinstar/gpdb,greenplum-db/gpdb,xinzweb/gpdb,arcivanov/postgres-xl,ashwinstar/gpdb,postmind-net/postgres-xl,zeroae/postgres-xl,edespino/gpdb,edespino/gpdb,oberstet/postgres-xl,kaknikhil/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,zaksoup/gpdb,postmind-net/postgres-xl,zaksoup/gpdb,jmcatamney/gpdb,edespino/gpdb,kmjungersen/PostgresXL,chrishajas/gpdb,janebeckman/gpdb,Quikling/gpdb,kaknikhil/gpdb,janebeckman/gpdb,0x0FFF/gpdb,50wu/gpdb,Postgres-XL/Postgres-XL,xinzweb/gpdb,royc1/gpdb,zeroae/postgres-xl,yuanzhao/gpdb,lisakowen/gpdb,royc1/gpdb,xinzweb/gpdb,pavanvd/postgres-xl,lintzc/gpdb,Chibin/gpdb,techdragon/Postgres-XL,chrishajas/gpdb,yazun/postgres-xl,kaknikhil/gpdb,adam8157/gpdb,rvs/gpdb,chrishajas/gpdb,lintzc/gpdb,lisakowen/gpdb,janebeckman/gpdb,CraigHarris/gpdb,rvs/gpdb,ovr/postgres-xl,ashwinstar/gpdb,janebeckman/gpdb,0x0FFF/gpdb,arcivanov/postgres-xl,adam8157/gpdb,rvs/gpdb,chrishajas/gpdb,ahachete/gpdb,zaksoup/gpdb,arcivanov/postgres-xl,snaga/postgres-xl,jmcatamney/gpdb,adam8157/gpdb,greenplum-db/gpdb,CraigHarris/gpdb,Chibin/gpdb,Postgres-XL/Postgres-XL,Chibin/gpdb,chrishajas/gpdb,edespino/gpdb,rvs/gpdb,CraigHarris/gpdb,cjcjameson/gpdb,lintzc/gpdb,0x0FFF/gpdb,lintzc/gpdb,xinzweb/gpdb,0x0FFF/gpdb,rvs/gpdb,janebeckman/gpdb,Chibin/gpdb,ahachete/gpdb,xuegang/gpdb,rvs/gpdb,greenplum-db/gpdb,CraigHarris/gpdb,Postgres-XL/Postgres-XL,yuanzhao/gpdb,janebeckman/gpdb,0x0FFF/gpdb,Quikling/gpdb,zaksoup/gpdb,rvs/gpdb,royc1/gpdb,Quikling/gpdb,Chibin/gpdb