Merge pull request #5909 from RosettaCommons/aleaverfay/fix_lr_bg_energy_accum_in_pack_daemon
Fixing a bug in MSD background long-range energy calc; only affected multistate
design runs.
Previously, long range two body energies for pairs of background residues
were not being accumulated into the background_energies_ which would lead
to 1) inaccurate representation of total energies of the states that
were being repacked and 2) a significant delta between those states and
poses that were not being packed at all.
This affected both the disulfide and rama_prepro terms.