bitbake: toaster: adapt xhr_import_layer test locally imported layer

Update xhr_import_layer test to use locally imported
layer in local_source_dir.

[YOCO #9911]

(Bitbake rev: f855490dd04281beb5ae65d82430203d9fd263fc)

Signed-off-by: Sujith H <sujith.h@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastergui/tests.py

@@ -154,6 +154,7 @@ class ViewTests(TestCase):
                 'name' : "base-layer",
                 'git_ref': "c12b9596afd236116b25ce26dbe0d793de9dc7ce",
                 'project_id': self.project.id,
+                'local_source_dir': "",
                 'dir_path' : "/path/in/repository"}
         response = self.client.post(reverse('xhr_importlayer'), args)
         data = json.loads(response.content.decode('utf-8'))