* stable-2.14:
AbstractQueryChangesTest#createInjector: Remove unnecessary 'throws Exception'
Fix copyAllScoresOnMergeFirstParentUpdate's documentation
Acceptance tests: Remove ES bootstrap boilerplate
Changes to ReindexIT done in I57e5d0718 ("Acceptance tests: Remove ES
bootstrap boilerplate") are reverted in this merge since that test
currently doesn't work with Elasticsearch on stable-2.15 (issue 8799).
Change-Id: Ie606d29f6d4867e6055482fc227eeab7274d281c