Description of problem:

When attempting to have the anaconda Software Selection spoke display an "Add-on" for an environment selected by default (checked in the GUI), we ran into an issue where dnf/libcomps doesn't appear to return the right value for such a group.

anaconda is using the base dnf class to see if groups are set to default.  In a test compose, we have the headless-management group defined as:

<group>
  <id>headless-management</id>
  <name>Headless Management</name>
  <description> Tools for managing the system without an attached graphical console.
  </description>
  <default>true</default>
  <uservisible>true</uservisible>
  <packagelist>
    <packagereq type="mandatory">cockpit-bridge</packagereq>
    <packagereq type="mandatory">cockpit-system</packagereq>
    <packagereq type="mandatory">cockpit-ws</packagereq>
    <packagereq type="mandatory">openssh-server</packagereq>
  </packagelist>
</group>

The group is also listed in the <optionlist> section of the environment.  When looking at the GUI, the headless management add-on is not selected, even though it should be.

Version-Release number of selected component (if applicable):

dnf-4.0.9.2-4.el8.noarch
libcomps-0.1.8-13.el8.x86_64

How reproducible:

Always

Steps to Reproduce:
1. Start an installation via anaconda, point it at a repo that has an addon with <default>true</default> defined
2. Go to the Software Spoke
3.

Actual results:
add-on not selected by default

Expected results:
add-on selected by default

Additional info:

I've copied Martin Kolman from the anaconda team, who can help with how the anaconda code flow works as needed.

I also tried specifying <default>True</default> in case it was a case-sensitive issue, but it appears the compose tooling changed it back to "true" in the output comps.xml file.