Description of problem:

When running multiple systems registrations simultaneously, candlepin generates deadlocks on the database and returns the error from $subject

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

How reproducible:

Always, on customer environment

Steps to Reproduce:
1. Force registration (or re-registration) of a large number of hosts (128 at the same time is what customer is doing)

Actual results:

Errors from $subject

Expected results:

Registration to work without errors

Additional info:

This appears to be the same issue reported on BZ 1758115, closed as WONTFIX.

QE Tracker for https://issues.redhat.com/browse/SAT-23872
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2268598