Update to latest metrics library

services/chat/package.json

@@ -11,7 +11,7 @@
     "coffee-script": "~1.7.1",
     "express": "3.3.1",
     "logger-sharelatex": "git+https://github.com/sharelatex/logger-sharelatex.git#master",
-    "metrics-sharelatex": "git+https://github.com/sharelatex/metrics-sharelatex.git#v1.7.0",
+    "metrics-sharelatex": "git+https://github.com/sharelatex/metrics-sharelatex.git#v1.7.1",
     "mongojs": "0.18.2",
     "redis": "~0.10.1",
     "request": "^2.79.0",