MONGOID-5673 [Monkey Patch Removal] Remove Object#do_or_do_not and Object#you_must

[johnnyshields]

Fixes MONGOID-5673

Object#do_or_do_not and Object#you_must are kernel monkey patches which are similar to #try. Someone got cute and added Star Wars Yoda references #do_or_do_not, there is no #try.

For #do_or_do_not usages which can obviously be replaced with #try or #send I've done so. The remaining usages are localized to the Bindable module, so I've added a convenience method there which I've named #try_method.

For #you_must, I've inlined the call the if frozen?

No tests added here because the method is private and trivial.

Don't be too proud of this technological terror you've constructed.
-- Darth Vader.

Note about Future Refactoring

#try (and #try_method used here) are code smells. #try_method should be removed entirely in in the future, but at least for now it's localized to the Bindable module (far better than a monkey patch on Object.)

Overall progress is tracked here: http://tinyurl.com/mongoid-monkey. Refer to MONGOID-5660 for context.