Fix internationalization errors on tests

[nikosmichas]

The following tests are failing currently

  test_should_fail_if_event_has_no_transition                     FAIL (0.02s)
        --- expected
        +++ actual
        @@ -1 +1 @@
        -["State event cannot transition when idling"]
        +["State event translation missing: en.mongoid.errors.models.mongoid_test/foo.attributes.state_event.invalid_event"]
        /home/app/test/machine_with_event_attributes_on_validation_test.rb:25:in `test_should_fail_if_event_has_no_transition'

  test_should_use_defaults                                        FAIL (0.03s)
        --- expected
        +++ actual
        @@ -1 +1 @@
        -["State cannot transition via \"ignite\""]
        +["State cannot ignite"]
        /home/app/test/machine_with_internationalization_test.rb:24:in `test_should_use_defaults'

  test_should_only_add_locale_once_in_load_path                   FAIL (0.01s)
        Expected: 1
          Actual: 0
        /home/app/test/machine_with_internationalization_test.rb:150:in `test_should_only_add_locale_once_in_load_path'

  test_should_invalidate_using_errors                             FAIL (0.02s)
        --- expected
        +++ actual
        @@ -1 +1 @@
        -["State cannot transition via \"park\""]
        +["State translation missing: en.mongoid.errors.models.mongoid_test/foo.attributes.state.invalid_transition"]
        /home/app/test/machine_with_validations_test.rb:17:in `test_should_invalidate_using_errors'

All those are translations related.
Adding the StateMachines::Integrations::Mongoid.locale_path to I18n.load_path allows the tests to run without failure.

[seuros]

Can you add all the other gemfile ?

[nikosmichas]

Can you add all the other gemfile ?

Sure, added for 5.0, 5.2 and 6.0. Is edge also needed like here ?

[seuros]

Yes 5.1.
Thanks

[seuros]

You should drop old version of ruby to pass the whole matrix.

You can drop tests in any unsupported versions of rails too.

[nikosmichas]

CI build passed https://travis-ci.org/github/state-machines/state_machines-mongoid/builds/704215825

[nikosmichas]

Hello @seuros
Do you need anything else for this PR ?