[Satellite 6.2] Katello API : POST /katello/api/v2/content_view_versions/:id/promote throws undesired exceptions

Issue

• Promoting content_view_version using Katello API, responds with an error.

• As per Katello API documentation for Satellite 6.2 following is the expected API to promote a content_view version:

POST /katello/api/v2/content_view_versions/:id/promote

This API can respond with any one of the following errors:

1. "{u'displayMessage': u"Validation failed: Label can't be blank, Label can't be blank, Name can't be blank, Name cannot be blank", u'errors': {u'name': [u"can't be blank", u'cannot be blank'], u'label': [u"can't be blank", u"can't be blank"]}}

2. {"displayMessage":"undefined method `promotable_or_removable?' for nil:NilClass","errors":["undefined method `promotable_or_removable?' for nil:NilClass"]}