Update to metrics 1.7.1

services/spelling/package.json

@@ -14,7 +14,7 @@
     "express": "^4.12.1",
     "logger-sharelatex": "git+https://github.com/sharelatex/logger-sharelatex.git#v1.1.0",
     "lru-cache": "^4.0.0",
-    "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": "1.3.0",
     "node-statsd": "0.0.3",
     "redis": "~0.8.4",