Fix plperl to discard cached function definition after CREATE OR REPLACE FUNCTION.  Clean up typlen/typmod errors inherited from pltcl.
Fix plperl to discard cached function definition after CREATE OR
REPLACE FUNCTION.  Clean up typlen/typmod errors inherited from pltcl.

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