Remove hash from the Enketo authentication.url config (#951)

Author: sadiqkhoja

files/enketo/config.json.template

@@ -8,7 +8,7 @@
         "api key": "${API_KEY}",
         "authentication": {
             "type": "cookie",
-            "url": "${BASE_URL}/#/login?next={RETURNURL}"
+            "url": "${BASE_URL}/login?next={RETURNURL}"
         },
         "name": "ODK Central",
         "server url": "${DOMAIN}"