Fixes #32060 - only call import applicability when needed

[jlsherrill]

No description provided.

[theforeman-bot]

Issues: #32060

[jlsherrill]

Import applicability is only supposed to be used when pulp2 is being used for yum (aka katello_applicability is false). The issue is that this import applicability is being run to pull applicability info from pulp2 when it hasn't even been calculated there. So a race condition exists where by the profile is being calculated by katello and being pulled in by pulp around the same time. Its not super easy to reproduce, but you can see the effects of it.

Without this pr:

1. on 3.18 configured to use pulp3, sync a repository with errata
2. register a system, subscribe it to the repo and make sure that errata are applicable
3. force sync the repository using the advanced sync option select 'complete sync'
4. go to audits, you'll see something like this:
   

notice the errata count changed and then immediately changed back

[ianballou]

Works like a charm!