update rspec monkey

this monkey-patch does:
```
# when mock receives unexpected message
# it adds line where mock was created to a message error
#    RSpec::Mocks::MockExpectationError: Mock "syncable" created on:
#     /.../spec/controllers/api/sync_controller_spec.rb:200 received unexpected message :sync with (no args)
```
I've updated it to work with current rspec we use. Update also removes `monkey eats only a banana! (this monkey needs rspec 2.(5-13)` warning.