Update sample configuration file to match reality
Update sample configuration file to match reality

The collapse_limit settings were bumped to 20 a long time ago with
the sample config left at the previous value of 8. Update the sample
to match reality.

Spotted by Jim Mccann

ashwinstar/gpdb,kaknikhil/gpdb,janebeckman/gpdb,yuanzhao/gpdb,rvs/gpdb,Chibin/gpdb,lintzc/gpdb,greenplum-db/gpdb,50wu/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,lintzc/gpdb,Quikling/gpdb,50wu/gpdb,50wu/gpdb,yuanzhao/gpdb,janebeckman/gpdb,Chibin/gpdb,edespino/gpdb,edespino/gpdb,jmcatamney/gpdb,50wu/gpdb,jmcatamney/gpdb,50wu/gpdb,adam8157/gpdb,yuanzhao/gpdb,lintzc/gpdb,50wu/gpdb,jmcatamney/gpdb,Chibin/gpdb,greenplum-db/gpdb,xinzweb/gpdb,Chibin/gpdb,cjcjameson/gpdb,edespino/gpdb,lintzc/gpdb,edespino/gpdb,lintzc/gpdb,Chibin/gpdb,lisakowen/gpdb,kaknikhil/gpdb,janebeckman/gpdb,Quikling/gpdb,greenplum-db/gpdb,kaknikhil/gpdb,kaknikhil/gpdb,edespino/gpdb,yuanzhao/gpdb,Quikling/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,lisakowen/gpdb,xinzweb/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,kaknikhil/gpdb,lintzc/gpdb,yuanzhao/gpdb,Chibin/gpdb,Quikling/gpdb,xinzweb/gpdb,janebeckman/gpdb,yuanzhao/gpdb,janebeckman/gpdb,edespino/gpdb,rvs/gpdb,Quikling/gpdb,janebeckman/gpdb,50wu/gpdb,Quikling/gpdb,rvs/gpdb,edespino/gpdb,cjcjameson/gpdb,Quikling/gpdb,edespino/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,lisakowen/gpdb,kaknikhil/gpdb,kaknikhil/gpdb,cjcjameson/gpdb,Chibin/gpdb,lisakowen/gpdb,cjcjameson/gpdb,janebeckman/gpdb,cjcjameson/gpdb,Quikling/gpdb,lisakowen/gpdb,lintzc/gpdb,janebeckman/gpdb,ashwinstar/gpdb,Chibin/gpdb,rvs/gpdb,kaknikhil/gpdb,rvs/gpdb,rvs/gpdb,greenplum-db/gpdb,adam8157/gpdb,edespino/gpdb,lisakowen/gpdb,lisakowen/gpdb,adam8157/gpdb,janebeckman/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,kaknikhil/gpdb,50wu/gpdb,adam8157/gpdb,cjcjameson/gpdb,rvs/gpdb,edespino/gpdb,adam8157/gpdb,greenplum-db/gpdb,Chibin/gpdb,cjcjameson/gpdb,rvs/gpdb,greenplum-db/gpdb,lintzc/gpdb,xinzweb/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,rvs/gpdb,Chibin/gpdb,adam8157/gpdb,lisakowen/gpdb,cjcjameson/gpdb,Quikling/gpdb,xinzweb/gpdb,xinzweb/gpdb,ashwinstar/gpdb,xinzweb/gpdb,rvs/gpdb,janebeckman/gpdb,lintzc/gpdb,adam8157/gpdb,ashwinstar/gpdb,kaknikhil/gpdb,xinzweb/gpdb,cjcjameson/gpdb,adam8157/gpdb,Quikling/gpdb,jmcatamney/gpdb