Update tests with administrator account

These tests now ensure that the proper privileges are observed when
creating/updating accounts so that only the right values can be
changed by the proper users in the usual and desired ways.  Most
functionality with the user login/logout/creation should be complete
at this point.
hiMerge branch 'master' of https://github.com/geisler/game_contest_server

Conflicts:
	spec/models/user_spec.rb