Using latest AR-JDBC for JRuby

1.2.5 and 1.2.6 are bad ones
Merge pull request #9609 from arunagw/using-latest-arjdbc

Using latest AR-JDBC for JRuby
Removing FIXME

As we did in master.
Merge pull request #9613 from arunagw/remove_fixme

Removing FIXME