Support multiple datasets


git-svn-id: svn+sshtunnel://coge.iplantcollaborative.org/storage/SVN.d/CoGe@908 aead6680-5d07-0410-860c-d65e5a4cd256
Fix to parse_saml_response for iPlant CAS update


git-svn-id: svn+sshtunnel://coge.iplantcollaborative.org/storage/SVN.d/CoGe@909 aead6680-5d07-0410-860c-d65e5a4cd256
Non-functional change


git-svn-id: svn+sshtunnel://coge.iplantcollaborative.org/storage/SVN.d/CoGe@910 aead6680-5d07-0410-860c-d65e5a4cd256