Add job_events to job class and remove job_plays

[bzwei]

Job play is a one type of job events. It is up to the application to make filtering through the options to get job plays from job events.

Job plays are thus deprecated and removed from the gem.

https://www.pivotaltracker.com/story/show/143606153

[syncrou]

@bzwei - I believe we can pull this out too - https://github.com/ansible/ansible_tower_client_ruby/blob/master/spec/factories/responses.rb#L48

[miq-bot]

Checked commit bzwei@afd2225 with ruby 2.2.6, rubocop 0.47.1, and haml-lint 0.20.0
4 files checked, 0 offenses detected
Everything looks good. ⭐

[syncrou]

@bzwei - One more question - Should this be pulled out too? -https://github.com/ansible/ansible_tower_client_ruby/blob/master/lib/ansible_tower_client/collection.rb#L68-L70 - We no longer need to override types like we had to for job_plays - so the klass || statement is no longer needed - nor is passing the klass for each new collection.

[bzwei]

@syncrou I think we can leave it as now in case we need similar handling for other cases in the future.

[bdunne]

@bzwei What else needs to override type?

[bzwei]

@bdunne @syncrou We may not have the case that needs overriding at this moment. I think it gives us the flexibility. We came up the solution with some effects. Keeping it here so that we don't need to reinvent if the such need comes.