Add 7.14.x entries to CHANGELOG-EE

CHANGELOG-EE

 v 8.0.0 (unreleased)
   - Fix navigation issue when viewing Group Settings pages
   - Guests and Reporters can approve merge request as well
-  - Add fast-forward merge option in project settings 
+  - Add fast-forward merge option in project settings
   - Separate rebase & fast-forward merge features
 
+v 7.14.3
+  - No changes
+
+v 7.14.2
+  - Fix the rebase before merge feature
+
+v 7.14.1
+  - Fix sign in form when just Kerberos is enabled
+
 v 7.14.0
   - Disable adding, updating and removing members from a group that is synced with LDAP
   - Don't send "Added to group" notifications when group is LDAP synched