Fixed multi negative

fixed excessive negative in AkInterval as well as undiscovered one with
date
nullPointerException still occurring in yaml test
Merge branch 'master' into NegTimeBug
adding yaml test

adding yaml test, other changes are made in the jdbc-adapter to fix bug
cleaner fix

made a cleaner fix
cleaned format too

made format function clearer
test for year added

added simple test for year
AkInterval isSupportForColumn

added AkInterval to cases for isSupportForColumn
Revert "AkInterval isSupportForColumn"

This reverts commit 34b25a02a2ae9edd80f8609747d82e0d9af1e4bf.
merge JerettS: Neg time bug

Merge pull request #1405 from JerettS/sql-layer/NegTimeBug
https://github.com/FoundationDB/sql-layer/pull/1405