Description of problem:
See Summary and https://github.com/Katello/katello/blob/master/app/lib/actions/pulp3/capsule_content/reclaim_space.rb#L11-L13 .
 

How reproducible:
100%
 

Steps to Reproduce:
1. Have a Capsule with "Inherit From Repository" download policy
2. Have a CV with two repos (one with On Demand, one with Immediate download policy) promoted to a LE associated to the Capsule
3. Sync the Capsule
4. Fetch a content from the On Demand repo in the CV/LE via the Capsule
5. Run Reclaim Space for the Capsule.

Actual behavior:
5. Fails with error 'Only On Demand smart proxies may have space reclaimed.'.

Expected behavior:
5. to reclaim space of exactly the On Demand repo on Capsule.

Business Impact / Additional info: