gpconfig: fix output formatting
gpconfig: fix output formatting

- the params given to an invocation of gpconfig may be returned by
sys.argv as including a list, so parse appropriately.

Signed-off-by: Shoaib Lari <ad045e028025f2970ed8506438710c2da1df61d5@pivotal.io>

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