Merge pull request #5063 from RosettaCommons/roccomoretti/fix_thread_frag_picker
Attempt to stabilize integration.thread fragment_picker test.
The fragment_picker test in the multithreaded case is noisy on the test server. This looks to be due to fragment sorting.
Depending on when the threads finish, equivalently scored fragments can come in different orders.
Attempt to stabilize this by sorting on FragID when the scores are identical.