Remove docker credentials from pr_pipeline
Remove docker credentials from pr_pipeline

Docker dependancies for this pipeline are now public, thus no authorized access is needed.

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