moved dump file deletion to the transform function
Fixes bug 1108472 - Ported SuperSearch service to new es module, using elasticsearch_dsl library.
Ported bug 1110003, fixed removal of namespace in fields names.
Tests are skiped if ES < 1.0, added a test for the facets size.
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Merge pull request #2510 from AdrianGaudebert/1108472-supersearch-with-es-dsl

Fixes bug 1108472 - Ported SuperSearch service to new es module, using e...
Fixes bug 1108473 - Added Super Search Fields services for ES 1.x. r=phrawzty
Merge pull request #2497 from twobraids/temp-dump-delete

Fixes Bug 1104790 - moved dump file deletion to the transform function