Merge pull request #3930 from RosettaCommons/smlewis/green-pdb-diag
This replaces the pass/fail system for the PDB diagnostic scientific test with a 5% failure threshhold instead of the granular "everything that passed before must continue passing". The previous version is "better" but also eternally red because something always goes wrong, and then we are trained to just ignore it. All the old reporting tools remain in place for fine grained diagnostics and finding bugs to fix: the test will now only turn red if something goes wrong in a big way (thousands of PDBs start failing). The threshold is at 5% failure.