Move virtual definition for default_security_group to OpenStack

[AparnaKarve]

Fixes the refresh issue.

Related PR #17975

/cc @agrare @Ladas

[kbrock]

While virtual_has_one is better over virtual_attribute, is it possible to use a delegate instead?

RESPONSE: nope. this is not written to be able to use a delegate

[AparnaKarve]

@kbrock So moving this virtual_has_one to OpenStack, seems to work for the API.

class ManageIQ::Providers::Openstack::CloudManager::CloudTenant < ::CloudTenant
  virtual_has_one :default_security_group, :uses => :security_groups
  ...
  ...
end

[miq-bot]

Checked commit AparnaKarve@6e6f2c8 with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
1 file checked, 0 offenses detected
Everything looks fine. ⭐

[AparnaKarve]

Moving the virtual definition of default_security_group to the OpenStack repo.
(discussed with @kbrock )

ManageIQ/manageiq-providers-openstack#355

[kbrock]

Please wait until ManageIQ/manageiq-providers-openstack#355 is green before merging this.

(just to make sure we aren't merging this under false assumptions)

[AparnaKarve]

@kbrock I wonder if it's the other way around...
Merging this PR may fix the specs in ManageIQ/manageiq-providers-openstack#355, or at least fix the refresh problem mentioned here #17975 (comment)

[AparnaKarve]

Verified locally that the OpenStack specs pass with this change and also with ManageIQ/manageiq-providers-openstack#355