Tweak postmaster code to avoid double reporting when bgwriter crashes.
Tweak postmaster code to avoid double reporting when bgwriter crashes.

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