Update CHANGELOG-EE.md for 9.1.2-ee

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CHANGELOG-EE.md

 Please view this file on the master branch, on stable branches it's out of date.
 
+## 9.1.2 (2017-05-01)
+
+- Fix commit search on some elasticsearch indexes. !1745
+- Fix emailing issues to projects when Service Desk is enabled.
+- Fix bug where Geo secondary Sidekiq cron jobs would not be activated if settings changed.
+
 ## 9.1.1 (2017-04-26)
 
 - No changes.

changelogs/unreleased-ee/2280-fix-commit-search.yml

----
-title: Fix commit search on some elasticsearch indexes
-merge_request: 1745
-author:

changelogs/unreleased-ee/fix-new-issue-mail-when-service-desk-enabled.yml

----
-title: Fix emailing issues to projects when Service Desk is enabled
-merge_request:
-author:

changelogs/unreleased-ee/sh-fix-geo-secondary-cron.yml

----
-title: Fix bug where Geo secondary Sidekiq cron jobs would not be activated if settings
-  changed
-merge_request:
-author: