fixes #5441 - Add instance_type support to oVirt provider

Fixes #21718 - Show errors properly when creating new oVirt CR

We try to retrieve available operating systems in an after_validation
hook. Trying to retrieve them makes no sense if the URL isn't
considered valid by us.

Fixes #21675 - OpenStack create host tab fails to load

Currently the tab is not loading as there are a few methods that are not
being overridden properly by the FogExtension.

After fixing that and adding the metadata key the tab loads

Fixes #12054 - Openstack v3 support

Fixes #12216 - support http proxies for compute resources

fixes #20878 - vmware clone: rewrite boot order

Fixes #20952 - Replace AC::Parameters Hash methods

Replaces any methods that used to be from Hash with the more limited
ActionController::Parameters API.

Fixes #19326 - create compute-resource - URL optional

Fixes #20452 - Keep password value after validation in ovirt CR

Fixes #20373 - Add ESXi 6.5 to VMWare