Improve the tests to see if ScalarArrayOpExpr is strict.  Original coding would basically punt in all cases for 'foo <> ALL (array)', which resulted in a performance regression for NOT IN compared to what we were doing in 8.1 and before.  Per report from Pavel Stehule.
Improve the tests to see if ScalarArrayOpExpr is strict.  Original coding
would basically punt in all cases for 'foo <> ALL (array)', which resulted
in a performance regression for NOT IN compared to what we were doing in
8.1 and before.  Per report from Pavel Stehule.

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