Update mysql-connector-java from 5.1.21 => 5.1.27

Update mysql-connector-java from 5.1.21 => 5.1.27
Match the latest upstream released version
Merge pull request #2029 from ancientrock/feature/mysql-connector-5.1.27

Update mysql-connector-java from 5.1.21 => 5.1.27
SqlQueryResult (case class, with statement warning) and Sql.executeQuery (+ documentation and tests).
Merge pull request #1988 from cchantep/cchantep-queryresult-warning-20131106

SqlQueryResult with statement warning
Merge remote-tracking branch: upstream/master