Add support for configuring remoting options

Allow remote-connector users to provide "options" property in the
datasource configuration, this "options" object is then passed down to
RemoteObjects and allows e.g. configuration of pass-through
authorization, where the remoting connector passes the access token
used to make the incoming request down to the backend service invoked.

lib/remote-connector.js

@@ -29,14 +29,14 @@ module.exports = RemoteConnector;
 function RemoteConnector(settings) {
   assert(typeof settings ===
     'object',
-    'cannot initiaze RemoteConnector without a settings object');
+    'cannot initialize RemoteConnector without a settings object');
   this.client = settings.client;
   this.adapter = settings.adapter || 'rest';
   this.protocol = settings.protocol || 'http';
   this.root = settings.root || '';
   this.host = settings.host || 'localhost';
   this.port = settings.port || 3000;
-  this.remotes = remoting.create();
+  this.remotes = remoting.create(settings.options);
   this.name = 'remote-connector';
 
   if (settings.url) {

test/helper.js

@@ -12,6 +12,7 @@ var remoteConnector = require('..');
 exports.createMemoryDataSource = createMemoryDataSource;
 exports.createModel = createModel;
 exports.createRemoteDataSource = createRemoteDataSource;
+exports.createRemoteDataSourceWithOptions = createRemoteDataSourceWithOptions;
 exports.createRestAppAndListen = createRestAppAndListen;
 exports.getUserProperties = getUserProperties;
 
@@ -44,6 +45,14 @@ function createRemoteDataSource(remoteApp) {
   });
 }
 
+function createRemoteDataSourceWithOptions(remoteApp, options) {
+  return loopback.createDataSource({
+    url: 'http://anyURL.com',
+    connector: remoteConnector,
+    options: options
+  });
+}
+
 /**
  * Used to create models based on a set of options. May associate or link to an
  * app.

test/remote-connector.test.js

@@ -134,3 +134,15 @@ describe('Custom Path', function() {
     });
   });
 });
+
+describe('RemoteConnector with options', () => {
+  it('should have the remoting options passed to the remote object', () => {
+    const serverApp = helper.createRestAppAndListen();
+
+    const datasource = helper.createRemoteDataSourceWithOptions(
+      serverApp,
+      {'test': 'abc'});
+
+    assert.deepEqual(datasource.connector.remotes.options, {test: 'abc'});
+  });
+});