Add warning for datasources with mismatched names

lib/datasource.js

@@ -375,6 +375,14 @@ DataSource.prototype.setup = function(name, settings) {
   name = name || (connector && connector.name);
   this.name = name;
 
+  if (typeof settings === 'object' && typeof settings.name === 'string' && name !== settings.name) {
+    console.warn(
+      'A datasource has a name of %j while a name of %j is specified in ' +
+        'its settings. Please adjust your configuration so these names match. ' +
+        '%j will be assigned as the actual datasource name.',
+      name, settings.name, name);
+  }
+
   if (name && !connector) {
     if (typeof name === 'object') {
       // The first argument might be the connector itself