Merge pull request #1730 from NuGet/qa

Qa -> Staging
Updated to NuGet.Core 2.7.2 and added script for generating test packages
Updated to JSON.Net 5.0.8
Updated Glimpse to 1.8.0
Updated to Owin 2.0.2
Added some additional validation
Fix #1680 by tweaking the thanks page
Fix #1679 by cleaning up the latest markers
Fix code review feedback
Fix #1745 by showing error if minClientVersion > current NuGet version
Fix #1670 by improving WebMatrix curation
Added script to clean old api key password columns
Added a migration to nullify old user columns
Fixed Azure SDK 2.2 reference issue
Fixes to Package edit job
Removed console outputs
Tweaked HandleQueuedPackageEditsTask to add a flag to re-run Failed Edits
Patched up some packages and fixed web.config
Removed test setting
Fix #1755 and #1759 by fixing up font-awesome references