Make subprocess invocation compatible with older Python
Make subprocess invocation compatible with older Python

jmcatamney/gpdb,50wu/gpdb,adam8157/gpdb,50wu/gpdb,adam8157/gpdb,xinzweb/gpdb,50wu/gpdb,xinzweb/gpdb,lisakowen/gpdb,adam8157/gpdb,jmcatamney/gpdb,greenplum-db/gpos,adam8157/gpdb,greenplum-db/gpdb,PengJi/gporca-comments,50wu/gpdb,greenplum-db/gpdb,adam8157/gpdb,xinzweb/gpdb,lisakowen/gpdb,xinzweb/gpdb,jmcatamney/gpdb,PengJi/gporca-comments,xinzweb/gpdb,greenplum-db/gpdb,greenplum-db/gpdb,greenplum-db/gpdb,greenplum-db/gporca,greenplum-db/gporca,xinzweb/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,PengJi/gporca-comments,PengJi/gporca-comments,greenplum-db/gpdb,greenplum-db/gpos,greenplum-db/gporca,adam8157/gpdb,greenplum-db/gporca,adam8157/gpdb,50wu/gpdb,lisakowen/gpdb,50wu/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,greenplum-db/gpos,lisakowen/gpdb,xinzweb/gpdb,adam8157/gpdb,xinzweb/gpdb,lisakowen/gpdb,greenplum-db/gpdb,PengJi/gporca-comments,50wu/gpdb,greenplum-db/gpos,jmcatamney/gpdb,50wu/gpdb,lisakowen/gpdb,lisakowen/gpdb,lisakowen/gpdb