See release notes at [[ https://www.gerritcodereview.com/2.15.html#2154 | 2.15.4 release notes ]]
Over [[ https://github.com/GerritCodeReview/gerrit/compare/v2.15.3...v2.15.4 | 247 commits ]] between 2.15.3 and 2.15.4
Fixes we want:
* Fixes support for Microsoft Edge in PolyGerrit.
* Fixes WIP event so it works again on current patchset.
** We will be able to use WIP event in wikibugs again.
* Fixes a issue that prevented 'Ready'/'Start Review' from showing in PolyGerrit if the change belonged to someone else.
* Fixes the Delete Branch permission check in the REST endpoint.
(not needed by us) but this changes the way search is shown for users.
"Modify search autocompletion to include only email."
This means it will show users email not "<Username> <email>"
* Also updating its-phabricator will drop the deprecated phabricator conduit api.