MockHttpBackend must check the request method when matching expectations

[vsavkin]

The following code works:

hb.expectPOST("/match").respond(200, 'blah');
hb('GET', '/match', callback);
hb.flush();
expect(callback).toHaveBeenCalled();

But it should throw "Unexpected GET /match'

[mhevery]

yes, should be fixed in AngularUnified.