Add config_info as additional attribute to Service Templates API

[jntullo]

This returns the config_info of a ServiceTemplate so the format returned matches the format that is expected for both create and update actions. IE, the expected input is:

      {
        :name         => 'Ansible Tower',
        :service_type => 'generic_ansible_tower',
        :prov_type    => 'amazon',
        :display      => 'false',
        :description  => 'a description',
        :config_info  => {
          :configuration_script_id => configuration_script.id,
          :provision               => {
            :fqname    => ra1.fqname,
            :dialog_id => service_dialog.id
          },
          :retirement              => {
            :fqname    => ra2.fqname,
            :dialog_id => service_dialog.id
          }
        }
      }

This format will now be returned when retrieving the service template.

@miq-bot add_label enhancement, api
@miq-bot assign @abellotti

cc: @bzwei

[abellotti]

@jntullo I'm generally ok with this. only concern is possible performance hit. Do folks querying /api/service_templates/ always want the config_info (as compared to asking for them via attributes=config_info) ? how much longer does it take to fetch let's say 100 or so templates with the related config_info. Thanks.

[jntullo]

@abellotti yes, very true. After looking at the performance on index, it isn't pretty. I think we will remove it from index and just keep it on show.

[miq-bot]

Checked commits jntullo/manageiq@b11c1b1~...6b6c6aa with ruby 2.2.6, rubocop 0.47.1, and haml-lint 0.20.0
2 files checked, 0 offenses detected
Everything looks good. 🍰

[abellotti]

Thanks @jntullo for the update, LGTM!!