Fixes #37702 - Registration - Find methods for taxonomies

[stejskalleos]

Load taxonomies in the finding methods to allow
easy extension from the plugins.

See Katello/katello#11094

[stejskalleos]

For documentation, the order of assigning taxonomies:

1. from the taxonomy_id parameter (if present)
2. User's default
3. First item from the user's assigned orgs/loc

For Katello, it's different, see Katello/katello#11094 (comment)

[stejskalleos]

@ShimShtein updated along with the Katello PR

[ShimShtein]

If we are spending time on this code, let's make it a bit more robust, especially if you want to extend it.

[stejskalleos]

@ShimShtein PR updated + added tests. Now exposed methods are default_organization and default_location. I haven't updated the Katello PR yet; I'll wait for the approved review here first.

[Lennonka]

For documentation, the order of assigning taxonomies:

1. from the taxonomy_id parameter (if present)
2. User's default
3. First item from the user's assigned orgs/loc

For Katello, it's different, see Katello/katello#11094 (comment)

@stejskalleos If you've changed the implementation then this ^^ behavior is also different than described previously?
The taxonomy_id parameter is a host parameter? What kind of parameter is it and where does the parameter come from?