Adjust mongoid config to fail quickly when the database is unreachable.

config/mongoid.yml

@@ -11,48 +11,40 @@ test:
       hosts:
         - localhost:27017
 
-production:
-  sessions:
-    default:
+common: &default_session
   uri: <%= ENV['MONGOHQ_URL'] %>
   options:
     skip_version_check: true
     safe: true
     consistency: strong
+    max_retries: 1
+    retry_interval: 0
+    timeout: 0.5
+
+production:
+  sessions:
+    default:
+      <<: *default_session
 
 edgeprod:
   sessions:
     default:
-      uri: <%= ENV['MONGOHQ_URL'] %>
-      options:
-        skip_version_check: true
-        safe: true
-        consistency: strong
+      <<: *default_session
 
 edgestage:
   sessions:
     default:
-      uri: <%= ENV['MONGOHQ_URL'] %>
-      options:
-        skip_version_check: true
-        safe: true
-        consistency: strong
+      <<: *default_session
 
 staging:
   sessions:
     default:
-      uri: <%= ENV['MONGOHQ_URL'] %>
+      <<: *default_session
 
 loadtest:
   sessions:
     default:
-      uri: <%= ENV['MONGOHQ_URL'] %>
-      options:
-        skip_version_check: true
-        safe: true
-        consistency: strong
-        max_retries: 1
-        retry_interval: 1
+      <<: *default_session
 
 defaults: &defaults
   use_utc: false