fixed excessive line feeds in pipe dump
Bug 939141 followup: don't crash on null pointers. I thought valid() was sufficient, but apparently this method can also return null.
added support classifier system
changes based on feedback
Merge pull request #1684 from twobraids/bitguard-classifier

FIxes Bug 940499 - add support classifier system
Merge pull request #1680 from bsmedberg/largest_free_vm_block

Bug 939141 followup: don't crash on null pointers. r=ted
Key errors no longer show a traceback
Merge pull request #1686 from twobraids/noisy-support-classifier

Fixes Bug 941070 - stop support classifier from being too chatty in logging
Fix Bug 753686, enable results count filter with a default of 50
Merge pull request #1675 from twobraids/pipedump-lf

Fixes Bug 938601 - fixed excessive line feeds in pipe dump
Merge pull request #1683 from ossreleasefeed/bug753686-enable-filter-to-select-number-of-results-tcbs

Fix Bug 753686, enable results count filter with a default of 50
fixes bug 932064 - Add duration of jobs to crontabber_log table, r=selenamarie
Fixes Bug 930994 - Forces exploitability report to honor product and version if provided.
Adds migration for exploitability report to Alembic.
Fixing some additional tests that were broken by my changes.
Adds migration components.
Fixing a small syntax error.
Updating migration revision down.
Fixing migrations, again.