Use external mock-request

mock-request is now factored out to matrix-mock-request; use it

test/app-tests/joining.js

@@ -36,7 +36,7 @@ var expect = require('expect');
 var q = require('q');
 
 var test_utils = require('../test-utils');
-var MockHttpBackend = require('../mock-request');
+var MockHttpBackend = require('matrix-mock-request');
 
 var HS_URL='http://localhost';
 var IS_URL='http://localhost';

test/app-tests/loading.js

@@ -33,7 +33,7 @@ import {VIEWS} from 'matrix-react-sdk/lib/components/structures/MatrixChat';
 import dis from 'matrix-react-sdk/lib/dispatcher';
 
 import * as test_utils from '../test-utils';
-import MockHttpBackend from '../mock-request';
+import MockHttpBackend from 'matrix-mock-request';
 import {parseQs, parseQsFromFragment} from '../../src/vector/url_utils';
 
 var DEFAULT_HS_URL='http://my_server';