Replace akka.event-handlers with akka.loggers
Fix json-parsing bug in Fastly stats
Merge pull request #1763 from guardian/replace-event-handlers

Replace akka.event-handlers with akka.loggers
Merge pull request #1768 from guardian/kc-fix-fastly

Fix json-parsing bug in Fastly stats
Merge branch 'master' into facia-tool-rename
Remove tests from facia-tool that were used in admin