Use ruby rspec convention in group spec

[iamjarvo]

Use rspecisms

I would have liked to take this refactor further but still exploring how vinyl works.

➜ ~/c/vinyldns-ruby git:(rspec-group-spec) ✗ bundle exec rspec spec/group_spec.rb

Vinyldns::API::Group
  .create
    can POST & receives 409 Conflict connecting to an already existing group
  .update
    can PUT & receives 400 Bad Request with "Missing Group"
    raises error when request_params argument is not hash
  .get
    does not raise an error
  .list_my_groups
    does not raise an error
    returns something
  .list_group_admins
    does not raise an error
  .list_group_members
    does not raise an error
  .get_group_activity
    does not raise an error

Finished in 4.49 seconds (files took 0.39254 seconds to load)
9 examples, 0 failures

[britneywright]

Thanks for the contribution. We need to look into the Travis CI failure.

[NorseGaud]

Travis was never fully set up. Your changes are great, so I'll check this in once I get Travis working.

[iamjarvo]

@NorseGaud I have some ideas on running the tests on travis. If you haven't started work I'd like to give it a shot.

[NorseGaud]

Sounds good.