Make gpinitsystem message clearer (#4104)
Make gpinitsystem message clearer (#4104)

* Update gpinitsystem

edit commit message: Marbin Tan<mtan@pivotal.io>
Change the symbol to actual words to better convey the meaning.
Primary segment # -> Number of primary segments
Mirror segment # -> Number of mirror segments
xinzweb/gpdb,ashwinstar/gpdb,adam8157/gpdb,edespino/gpdb,edespino/gpdb,Chibin/gpdb,lisakowen/gpdb,Chibin/gpdb,Chibin/gpdb,greenplum-db/gpdb,edespino/gpdb,greenplum-db/gpdb,greenplum-db/gpdb,edespino/gpdb,50wu/gpdb,xinzweb/gpdb,Chibin/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,Chibin/gpdb,xinzweb/gpdb,ashwinstar/gpdb,xinzweb/gpdb,adam8157/gpdb,ashwinstar/gpdb,ashwinstar/gpdb,Chibin/gpdb,xinzweb/gpdb,50wu/gpdb,Chibin/gpdb,50wu/gpdb,50wu/gpdb,lisakowen/gpdb,50wu/gpdb,lisakowen/gpdb,lisakowen/gpdb,Chibin/gpdb,lisakowen/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,xinzweb/gpdb,adam8157/gpdb,adam8157/gpdb,edespino/gpdb,greenplum-db/gpdb,edespino/gpdb,50wu/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,lisakowen/gpdb,adam8157/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,xinzweb/gpdb,Chibin/gpdb,lisakowen/gpdb,edespino/gpdb,50wu/gpdb,jmcatamney/gpdb,adam8157/gpdb,jmcatamney/gpdb,edespino/gpdb,adam8157/gpdb,edespino/gpdb,jmcatamney/gpdb,adam8157/gpdb,edespino/gpdb,lisakowen/gpdb,50wu/gpdb,Chibin/gpdb,xinzweb/gpdb