Make download_concurrency configurable in pulpcore
currently remotes have this field available, but katello doesn't expose it. see https://pulp.plan.io/issues/7186 for details
#1 Updated by Ian Ballou about 2 years ago
From some preliminary testing by @ggainey, it looks like a Pulp 3 sync concurrency of 5-7 would be a good default: https://hackmd.io/@ggainey/pulp3_sync_concurrency
Pulp is aiming to change their default to one of these values, so we could just not set the value at all on the remote as a default.