Spring Add method that execute batch update by named param

Prior to this commit, BatchSqlUpdate class didn't override updateByNamedParam() method but overrided update() method only.

Now BatchSqlUpdate class support both method. This change would make BatchSqlUpdate class more consistent because parent SqlUpdate class supports both method.

To add new method, existing codes from SqlUpdate class and BatchSqlUpdate class were reused.

Issue: SPR-10435

Comment From: philwebb

Thanks for the pull request, have you signed the Spring CLA [1]?

[1] https://github.com/SpringSource/spring-framework/blob/master/CONTRIBUTING.md#sign-the-contributor-license-agreement

Comment From: teddyjoo

I have signed and agree to the terms of the SpringSource Individual Contributor License Agreement.

Comment From: pivotal-cla

@teddyjoo Please sign the Contributor License Agreement!

Click here to manually synchronize the status of this Pull Request.

See the FAQ for frequently asked questions.

Comment From: snicoll

Unfortunately the CLA has not been signed so there's nothing we can do. @teddyjoo if you're still around and you're willing to sign the CLA, please add a comment here and we can reopen.