Merge pull request #556 from RosettaCommons/vmullig/fix_fragment_filter
Fixing the FragmentLookupFilter's unstable behaviour
The FragmentLookupFilter had a number of uninitialized variables in its default constructor. I was scratching my head as to why it seemed to work some of the time and not other times until I figured this out.
No test changes expected (or seen when the branch was tested), except for the currently-unstable integration.mpi test that I still need to fix.