Add product version 12 (SQL 2014)

SQL 2014 returns a product version that starts with 12.  If you don't
check for it, DropDefaultValueGenerator will assume it's SQL 2005.
Remove unused import from a sun package.

BigInt was an unused import from a sun package.  It looks like it's
removed in Java 8.
Merge pull request #262 from dskiles/master

SQL 2014 - Initial Unlock