fix deprecation messages coming from mongodb(server options are moved to root level)

Author: cahva

lib/mongoHandler.js

@@ -175,10 +175,8 @@ MongoStore.prototype.initialise = function(resourceConfig) {
   self.resourceConfig = resourceConfig;
   self.relationshipAttributeNames = MongoStore._getRelationshipAttributeNames(resourceConfig.attributes);
   mongodb.MongoClient.connect(self._config.url, {
-    server: {
-      reconnectTries: 999999999,
-      reconnectInterval: 5000
-    }
+    reconnectTries: 999999999,
+    reconnectInterval: 5000
   }).then(function(db) {
     self._db = db;
     self._db.on("close", function(err) {