When we are on an RHEL 8.x host we need to supply `rhel-8x` as
target distro. The previous code just used the major version so
we always built `rhel-8`, i.e. RHEL 8.3.
Change the integration test so that it adapts to the host, i.e. it
will take the name, version and architecture for the tags and urls
for the repos from the host it is running on. This should make it
more future proof since we now have a central place where this is
configured: the ci configuration, i.e. `.gitlab-ci.yml`.
Upstream composer has introduce a few changes that we need to
adapt for:
- the koji composer API is now exposed on the standard https
port (443). Thus koji hub and web need to move to a different
pair: 8080 (http) and 4343 (https). Change the scripts and
tests for that
- the koji API gained a prefix 'api/composer-koji/v1/'. Change
client and unit tests to use that prefix. Use urljoin to
create new APIs
- composer configuration format (osbuild-composer.toml) has
changed and now also includes configuration for the CA
and allowed domains
- update the composer RPM repositories to the commit for the
21 upstream release.
Add a separate unit test to do a compose for a RHEL based image,
but then restrict the execution of test_compose_{disto} to the
distribution the test is running on, since currently cross-
distribution builds can be problematic.
