fix(notifier): disable notifier in key_server.js (#1852) r=jrgm
fix(notifier): disable notifier in key_server.js (#1852) r=jrgm


mozilla/fxa-auth-server,eoger/fxa-auth-server,eoger/fxa-auth-server,eoger/fxa-auth-server,mozilla/fxa-auth-server,mozilla/fxa-auth-server,eoger/fxa-auth-server,mozilla/fxa-auth-server