Test showing Intersect_Ordered doesn't honor comparables
Handle nulls in MKeyComparables
Use TComparisons for comparing jump rows
Avoid null filled comparison list
Stale import
merge nathanlws: Always use TComparisons in Intersect_Ordered

Merge pull request #1226 from nathanlws/sql-layer/fix-intersect-different-types
https://github.com/FoundationDB/sql-layer/pull/1226