Revert off setting mention for client_min_messages.
Revert off setting mention for client_min_messages.

Set log_min_error_messages to the proper and agreed-upon default, PANIC
(off).  (BACKPATCH)

tangp3/gpdb,xinzweb/gpdb,yuanzhao/gpdb,yazun/postgres-xl,lintzc/gpdb,0x0FFF/gpdb,zaksoup/gpdb,rubikloud/gpdb,edespino/gpdb,adam8157/gpdb,0x0FFF/gpdb,tpostgres-projects/tPostgres,jmcatamney/gpdb,foyzur/gpdb,50wu/gpdb,edespino/gpdb,Chibin/gpdb,ahachete/gpdb,greenplum-db/gpdb,xuegang/gpdb,snaga/postgres-xl,randomtask1155/gpdb,cjcjameson/gpdb,lpetrov-pivotal/gpdb,lisakowen/gpdb,yazun/postgres-xl,zeroae/postgres-xl,kaknikhil/gpdb,yazun/postgres-xl,adam8157/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,rubikloud/gpdb,cjcjameson/gpdb,Quikling/gpdb,lisakowen/gpdb,Chibin/gpdb,cjcjameson/gpdb,kmjungersen/PostgresXL,zaksoup/gpdb,Postgres-XL/Postgres-XL,ahachete/gpdb,pavanvd/postgres-xl,oberstet/postgres-xl,ashwinstar/gpdb,greenplum-db/gpdb,lintzc/gpdb,adam8157/gpdb,randomtask1155/gpdb,kaknikhil/gpdb,lisakowen/gpdb,Chibin/gpdb,ashwinstar/gpdb,kaknikhil/gpdb,zaksoup/gpdb,yuanzhao/gpdb,50wu/gpdb,adam8157/gpdb,rubikloud/gpdb,xuegang/gpdb,cjcjameson/gpdb,rubikloud/gpdb,Postgres-XL/Postgres-XL,lpetrov-pivotal/gpdb,cjcjameson/gpdb,kaknikhil/gpdb,lisakowen/gpdb,50wu/gpdb,kmjungersen/PostgresXL,ashwinstar/gpdb,greenplum-db/gpdb,0x0FFF/gpdb,Chibin/gpdb,postmind-net/postgres-xl,greenplum-db/gpdb,randomtask1155/gpdb,yuanzhao/gpdb,janebeckman/gpdb,jmcatamney/gpdb,0x0FFF/gpdb,atris/gpdb,foyzur/gpdb,lisakowen/gpdb,CraigHarris/gpdb,zaksoup/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,lintzc/gpdb,ovr/postgres-xl,tangp3/gpdb,rvs/gpdb,ahachete/gpdb,lintzc/gpdb,tangp3/gpdb,rvs/gpdb,rvs/gpdb,chrishajas/gpdb,zeroae/postgres-xl,Chibin/gpdb,rvs/gpdb,0x0FFF/gpdb,Quikling/gpdb,tangp3/gpdb,tpostgres-projects/tPostgres,techdragon/Postgres-XL,lpetrov-pivotal/gpdb,pavanvd/postgres-xl,foyzur/gpdb,ahachete/gpdb,edespino/gpdb,oberstet/postgres-xl,kmjungersen/PostgresXL,yuanzhao/gpdb,randomtask1155/gpdb,chrishajas/gpdb,yuanzhao/gpdb,techdragon/Postgres-XL,CraigHarris/gpdb,zaksoup/gpdb,Quikling/gpdb,xinzweb/gpdb,rubikloud/gpdb,lpetrov-pivotal/gpdb,janebeckman/gpdb,lpetrov-pivotal/gpdb,ahachete/gpdb,yuanzhao/gpdb,postmind-net/postgres-xl,atris/gpdb,snaga/postgres-xl,kmjungersen/PostgresXL,edespino/gpdb,Quikling/gpdb,ashwinstar/gpdb,lpetrov-pivotal/gpdb,edespino/gpdb,atris/gpdb,atris/gpdb,kaknikhil/gpdb,50wu/gpdb,jmcatamney/gpdb,royc1/gpdb,ashwinstar/gpdb,kaknikhil/gpdb,tangp3/gpdb,lpetrov-pivotal/gpdb,postmind-net/postgres-xl,snaga/postgres-xl,janebeckman/gpdb,Postgres-XL/Postgres-XL,cjcjameson/gpdb,chrishajas/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,pavanvd/postgres-xl,Quikling/gpdb,ahachete/gpdb,techdragon/Postgres-XL,pavanvd/postgres-xl,rubikloud/gpdb,lintzc/gpdb,zeroae/postgres-xl,foyzur/gpdb,Quikling/gpdb,0x0FFF/gpdb,pavanvd/postgres-xl,arcivanov/postgres-xl,xinzweb/gpdb,xuegang/gpdb,adam8157/gpdb,chrishajas/gpdb,zaksoup/gpdb,royc1/gpdb,royc1/gpdb,Chibin/gpdb,randomtask1155/gpdb,adam8157/gpdb,greenplum-db/gpdb,zeroae/postgres-xl,rvs/gpdb,lintzc/gpdb,tpostgres-projects/tPostgres,kaknikhil/gpdb,janebeckman/gpdb,janebeckman/gpdb,lisakowen/gpdb,royc1/gpdb,foyzur/gpdb,lintzc/gpdb,adam8157/gpdb,CraigHarris/gpdb,yazun/postgres-xl,jmcatamney/gpdb,Quikling/gpdb,tpostgres-projects/tPostgres,lintzc/gpdb,zeroae/postgres-xl,jmcatamney/gpdb,xinzweb/gpdb,arcivanov/postgres-xl,ashwinstar/gpdb,xinzweb/gpdb,tpostgres-projects/tPostgres,techdragon/Postgres-XL,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,xuegang/gpdb,xuegang/gpdb,Chibin/gpdb,snaga/postgres-xl,greenplum-db/gpdb,yuanzhao/gpdb,janebeckman/gpdb,lisakowen/gpdb,chrishajas/gpdb,kmjungersen/PostgresXL,edespino/gpdb,CraigHarris/gpdb,foyzur/gpdb,royc1/gpdb,arcivanov/postgres-xl,ovr/postgres-xl,cjcjameson/gpdb,tangp3/gpdb,atris/gpdb,Chibin/gpdb,lintzc/gpdb,Quikling/gpdb,CraigHarris/gpdb,rvs/gpdb,Quikling/gpdb,atris/gpdb,chrishajas/gpdb,oberstet/postgres-xl,adam8157/gpdb,randomtask1155/gpdb,50wu/gpdb,ovr/postgres-xl,Chibin/gpdb,oberstet/postgres-xl,yuanzhao/gpdb,Chibin/gpdb,zaksoup/gpdb,royc1/gpdb,janebeckman/gpdb,kaknikhil/gpdb,lisakowen/gpdb,chrishajas/gpdb,randomtask1155/gpdb,Quikling/gpdb,kaknikhil/gpdb,lpetrov-pivotal/gpdb,foyzur/gpdb,snaga/postgres-xl,CraigHarris/gpdb,rubikloud/gpdb,edespino/gpdb,ashwinstar/gpdb,50wu/gpdb,techdragon/Postgres-XL,royc1/gpdb,randomtask1155/gpdb,tangp3/gpdb,CraigHarris/gpdb,CraigHarris/gpdb,arcivanov/postgres-xl,edespino/gpdb,yuanzhao/gpdb,ovr/postgres-xl,xinzweb/gpdb,yazun/postgres-xl,edespino/gpdb,rvs/gpdb,rvs/gpdb,ahachete/gpdb,janebeckman/gpdb,foyzur/gpdb,xuegang/gpdb,xinzweb/gpdb,cjcjameson/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,rvs/gpdb,royc1/gpdb,arcivanov/postgres-xl,50wu/gpdb,CraigHarris/gpdb,rubikloud/gpdb,xuegang/gpdb,edespino/gpdb,chrishajas/gpdb,atris/gpdb,xuegang/gpdb,rvs/gpdb,xinzweb/gpdb,janebeckman/gpdb,atris/gpdb,tangp3/gpdb,0x0FFF/gpdb,arcivanov/postgres-xl,cjcjameson/gpdb,ahachete/gpdb,50wu/gpdb,0x0FFF/gpdb,kaknikhil/gpdb,postmind-net/postgres-xl,zaksoup/gpdb,postmind-net/postgres-xl,ovr/postgres-xl,janebeckman/gpdb,xuegang/gpdb,oberstet/postgres-xl