has backfill script ask for a username instead of hardcoding "admin"
has backfill script ask for a username instead of hardcoding "admin"

Review URL: http://rietku.appspot.com/28003

git-svn-id: dbaa4332fac6d3bc07368f7b59cc8835cd8c73e4@100 6315f19a-1029-11de-a3bf-55d8bd1d7a4a

tallstreet/jaikuenginepatch,tallstreet/jaikuenginepatch,tallstreet/jaikuenginepatch,tallstreet/jaikuenginepatch