fix tests with rubinius 2.2 and rails 3.2
fix tests with rubinius 2.2 and rails 3.2

mallikarjunayaddala/active_scaffold,activescaffold/active_scaffold,budree/active_scaffold,activescaffold/active_scaffold,budree/active_scaffold,activescaffold/active_scaffold,mallikarjunayaddala/active_scaffold,AlbertoBarrago/active_scaffold,AlbertoBarrago/active_scaffold,budree/active_scaffold,AlbertoBarrago/active_scaffold,mallikarjunayaddala/active_scaffold