Up MASTER_MAX_CONNECT for ICG
Up MASTER_MAX_CONNECT for ICG

Commit 35e0dfdb14ce8175012c65ee722e7b00211a79cb first bumped this up for
an isolation test.
Higher and higher concurrency has since crept into installcheck,
resulting in a flaky group that contains `mapred`. This hopefully
addresses that flake.

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