update ElasticsearchRestTemplate.delete,add withFilter()

[loupXing]

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[xhaggi]

Before we can accept your contribution you have to read our Spring Data contribution guidelines carefully and file an issue to our JIRA.

[pnowak85]

This PR would also fix the bug described in DATAES-525, but the main problem is the doScroll (see DATAES-525).
I think instead of adding the filter clause the root issue should be fixed and also this change would make the ElasticsearchRestTemplate behave differently than the ElasticsearchTemplate.

I have made a Pull Request which fixes the doScroll method and thereby resolving the deletion issue which should make this PR obsolete.

[xhaggi]

Superseded by #240