Fix monkey patch for Rollout 1.2.0

[ches]

The latest Rollout makes the second argument of active? optional -- if nil it checks if a feature is globally active. Adding the default to the monkey patch should be backwards compatible with older versions of Rollout for non-pathological cases since there is no arity change.

[ches]

Good case for groaning about monkey patches :weary: I tested something on a feature branch where RolloutUI wasn't installed yet, merged the branch to mainline where it was installed, failed to adequately test the scenario again after the merge, and it cost me smooth dark launch of a new feature after deploying it and discovering the need for this patch :sob:

[mmzoo]

+1

[gingerlime]

+1

[jrallison]

Thanks Ches!

[mmzoo]

Thank you!