Clean up execnodes.h to match upstream more closely.
Clean up execnodes.h to match upstream more closely.

Mostly whitespace changes.

kaknikhil/gpdb,edespino/gpdb,greenplum-db/gpdb,cjcjameson/gpdb,lintzc/gpdb,adam8157/gpdb,lintzc/gpdb,lpetrov-pivotal/gpdb,atris/gpdb,randomtask1155/gpdb,adam8157/gpdb,0x0FFF/gpdb,adam8157/gpdb,Chibin/gpdb,Quikling/gpdb,foyzur/gpdb,cjcjameson/gpdb,kaknikhil/gpdb,lintzc/gpdb,ahachete/gpdb,yuanzhao/gpdb,50wu/gpdb,greenplum-db/gpdb,foyzur/gpdb,zaksoup/gpdb,edespino/gpdb,lintzc/gpdb,royc1/gpdb,xuegang/gpdb,randomtask1155/gpdb,janebeckman/gpdb,rubikloud/gpdb,randomtask1155/gpdb,edespino/gpdb,Quikling/gpdb,randomtask1155/gpdb,50wu/gpdb,ahachete/gpdb,edespino/gpdb,randomtask1155/gpdb,chrishajas/gpdb,50wu/gpdb,cjcjameson/gpdb,lpetrov-pivotal/gpdb,50wu/gpdb,tangp3/gpdb,atris/gpdb,tangp3/gpdb,chrishajas/gpdb,adam8157/gpdb,xinzweb/gpdb,foyzur/gpdb,royc1/gpdb,rubikloud/gpdb,rubikloud/gpdb,50wu/gpdb,cjcjameson/gpdb,royc1/gpdb,xuegang/gpdb,tangp3/gpdb,jmcatamney/gpdb,chrishajas/gpdb,royc1/gpdb,kaknikhil/gpdb,yuanzhao/gpdb,foyzur/gpdb,kaknikhil/gpdb,rvs/gpdb,CraigHarris/gpdb,50wu/gpdb,janebeckman/gpdb,lpetrov-pivotal/gpdb,lintzc/gpdb,ashwinstar/gpdb,kaknikhil/gpdb,zaksoup/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,janebeckman/gpdb,tangp3/gpdb,jmcatamney/gpdb,foyzur/gpdb,Chibin/gpdb,randomtask1155/gpdb,Chibin/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,kaknikhil/gpdb,rvs/gpdb,yuanzhao/gpdb,rvs/gpdb,lintzc/gpdb,atris/gpdb,atris/gpdb,zaksoup/gpdb,rubikloud/gpdb,Chibin/gpdb,lisakowen/gpdb,CraigHarris/gpdb,xuegang/gpdb,chrishajas/gpdb,CraigHarris/gpdb,lpetrov-pivotal/gpdb,janebeckman/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,ashwinstar/gpdb,janebeckman/gpdb,lisakowen/gpdb,jmcatamney/gpdb,adam8157/gpdb,0x0FFF/gpdb,xuegang/gpdb,adam8157/gpdb,zaksoup/gpdb,xuegang/gpdb,janebeckman/gpdb,0x0FFF/gpdb,cjcjameson/gpdb,xinzweb/gpdb,rubikloud/gpdb,50wu/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,foyzur/gpdb,chrishajas/gpdb,lpetrov-pivotal/gpdb,rubikloud/gpdb,ashwinstar/gpdb,Quikling/gpdb,adam8157/gpdb,tangp3/gpdb,jmcatamney/gpdb,tangp3/gpdb,kaknikhil/gpdb,Quikling/gpdb,50wu/gpdb,xuegang/gpdb,yuanzhao/gpdb,foyzur/gpdb,lisakowen/gpdb,atris/gpdb,edespino/gpdb,lintzc/gpdb,lintzc/gpdb,xinzweb/gpdb,edespino/gpdb,ashwinstar/gpdb,0x0FFF/gpdb,greenplum-db/gpdb,janebeckman/gpdb,zaksoup/gpdb,Quikling/gpdb,ahachete/gpdb,rubikloud/gpdb,CraigHarris/gpdb,xinzweb/gpdb,cjcjameson/gpdb,kaknikhil/gpdb,yuanzhao/gpdb,atris/gpdb,randomtask1155/gpdb,royc1/gpdb,royc1/gpdb,Chibin/gpdb,lpetrov-pivotal/gpdb,lisakowen/gpdb,Chibin/gpdb,jmcatamney/gpdb,lisakowen/gpdb,ashwinstar/gpdb,xuegang/gpdb,edespino/gpdb,Quikling/gpdb,adam8157/gpdb,ahachete/gpdb,kaknikhil/gpdb,rvs/gpdb,royc1/gpdb,ahachete/gpdb,zaksoup/gpdb,CraigHarris/gpdb,greenplum-db/gpdb,rvs/gpdb,CraigHarris/gpdb,chrishajas/gpdb,Quikling/gpdb,0x0FFF/gpdb,ahachete/gpdb,yuanzhao/gpdb,CraigHarris/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,zaksoup/gpdb,0x0FFF/gpdb,lisakowen/gpdb,Quikling/gpdb,ahachete/gpdb,Chibin/gpdb,yuanzhao/gpdb,foyzur/gpdb,greenplum-db/gpdb,0x0FFF/gpdb,rvs/gpdb,lisakowen/gpdb,Quikling/gpdb,yuanzhao/gpdb,royc1/gpdb,rvs/gpdb,randomtask1155/gpdb,greenplum-db/gpdb,lintzc/gpdb,Quikling/gpdb,Chibin/gpdb,chrishajas/gpdb,edespino/gpdb,chrishajas/gpdb,tangp3/gpdb,xinzweb/gpdb,atris/gpdb,xuegang/gpdb,rubikloud/gpdb,xinzweb/gpdb,zaksoup/gpdb,atris/gpdb,xinzweb/gpdb,ahachete/gpdb,tangp3/gpdb,ashwinstar/gpdb,rvs/gpdb,xuegang/gpdb,janebeckman/gpdb,yuanzhao/gpdb,lisakowen/gpdb,cjcjameson/gpdb,rvs/gpdb,Chibin/gpdb,janebeckman/gpdb,janebeckman/gpdb,0x0FFF/gpdb,lpetrov-pivotal/gpdb,edespino/gpdb,ashwinstar/gpdb,xinzweb/gpdb,edespino/gpdb,jmcatamney/gpdb,kaknikhil/gpdb,Chibin/gpdb,lpetrov-pivotal/gpdb,rvs/gpdb,greenplum-db/gpdb