Fix typos in executor code comments
Fix typos in executor code comments

ashwinstar/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,lintzc/gpdb,lisakowen/gpdb,50wu/gpdb,kaknikhil/gpdb,CraigHarris/gpdb,chrishajas/gpdb,50wu/gpdb,adam8157/gpdb,CraigHarris/gpdb,jmcatamney/gpdb,adam8157/gpdb,CraigHarris/gpdb,Chibin/gpdb,Quikling/gpdb,0x0FFF/gpdb,chrishajas/gpdb,xuegang/gpdb,rvs/gpdb,rvs/gpdb,cjcjameson/gpdb,cjcjameson/gpdb,ashwinstar/gpdb,kaknikhil/gpdb,edespino/gpdb,lintzc/gpdb,kaknikhil/gpdb,rvs/gpdb,kaknikhil/gpdb,edespino/gpdb,greenplum-db/gpdb,0x0FFF/gpdb,Chibin/gpdb,Chibin/gpdb,0x0FFF/gpdb,Quikling/gpdb,janebeckman/gpdb,lisakowen/gpdb,janebeckman/gpdb,adam8157/gpdb,greenplum-db/gpdb,xuegang/gpdb,rvs/gpdb,xuegang/gpdb,0x0FFF/gpdb,CraigHarris/gpdb,edespino/gpdb,Quikling/gpdb,yuanzhao/gpdb,lisakowen/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,50wu/gpdb,jmcatamney/gpdb,lintzc/gpdb,cjcjameson/gpdb,jmcatamney/gpdb,Quikling/gpdb,yuanzhao/gpdb,CraigHarris/gpdb,0x0FFF/gpdb,edespino/gpdb,lintzc/gpdb,yuanzhao/gpdb,50wu/gpdb,xuegang/gpdb,xuegang/gpdb,50wu/gpdb,cjcjameson/gpdb,Quikling/gpdb,yuanzhao/gpdb,Chibin/gpdb,xuegang/gpdb,xuegang/gpdb,ashwinstar/gpdb,kaknikhil/gpdb,yuanzhao/gpdb,xuegang/gpdb,janebeckman/gpdb,chrishajas/gpdb,janebeckman/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,royc1/gpdb,janebeckman/gpdb,chrishajas/gpdb,janebeckman/gpdb,adam8157/gpdb,janebeckman/gpdb,0x0FFF/gpdb,lisakowen/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,xinzweb/gpdb,lisakowen/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,kaknikhil/gpdb,edespino/gpdb,lintzc/gpdb,chrishajas/gpdb,lisakowen/gpdb,janebeckman/gpdb,edespino/gpdb,adam8157/gpdb,50wu/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,Quikling/gpdb,lintzc/gpdb,0x0FFF/gpdb,0x0FFF/gpdb,ashwinstar/gpdb,royc1/gpdb,adam8157/gpdb,Quikling/gpdb,lintzc/gpdb,janebeckman/gpdb,xinzweb/gpdb,lisakowen/gpdb,lisakowen/gpdb,xinzweb/gpdb,50wu/gpdb,jmcatamney/gpdb,kaknikhil/gpdb,greenplum-db/gpdb,rvs/gpdb,CraigHarris/gpdb,adam8157/gpdb,Chibin/gpdb,yuanzhao/gpdb,Quikling/gpdb,ashwinstar/gpdb,royc1/gpdb,greenplum-db/gpdb,xuegang/gpdb,50wu/gpdb,Chibin/gpdb,Quikling/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,chrishajas/gpdb,xinzweb/gpdb,rvs/gpdb,Chibin/gpdb,Chibin/gpdb,Chibin/gpdb,yuanzhao/gpdb,xinzweb/gpdb,royc1/gpdb,edespino/gpdb,royc1/gpdb,kaknikhil/gpdb,chrishajas/gpdb,lintzc/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,xinzweb/gpdb,yuanzhao/gpdb,chrishajas/gpdb,yuanzhao/gpdb,rvs/gpdb,Quikling/gpdb,royc1/gpdb,greenplum-db/gpdb,edespino/gpdb,xinzweb/gpdb,royc1/gpdb,adam8157/gpdb,edespino/gpdb,kaknikhil/gpdb,edespino/gpdb,lintzc/gpdb,janebeckman/gpdb,kaknikhil/gpdb,royc1/gpdb,rvs/gpdb,Chibin/gpdb,ashwinstar/gpdb,rvs/gpdb,rvs/gpdb,xinzweb/gpdb