Add missing SpinRelease() to a couple of error exits --- bug found while testing concurrent VACUUMs.
Add missing SpinRelease() to a couple of error exits --- bug found while
testing concurrent VACUUMs.

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