Fix router debug command

After the changes for drivers in Liberty, the astara-debug-router script
was broken.  This script helps to debug how a worker processes a single
message and enables PDB usage.

This is a modified backport since the files were moved in the master branch.

Change-Id: I69f04ff6f04a58d45737dca770f585f468e3ad58
Closes-Bug: 1524979

akanda/rug/debug.py

@@ -21,6 +21,7 @@ import sys
 
 from oslo_config import cfg
 
+from akanda.rug import drivers
 from akanda.rug import state
 from akanda.rug import worker
 
@@ -68,10 +69,11 @@ def debug_one_router(args=sys.argv[1:]):
     log.debug('Proxy settings: %r', os.getenv('no_proxy'))
 
     context = worker.WorkerContext()
-    router_obj = context.neutron.get_router_detail(cfg.CONF.router_id)
+    driver = drivers.get('router')(context, cfg.CONF.router_id)
     a = state.Automaton(
-        router_id=cfg.CONF.router_id,
-        tenant_id=router_obj.tenant_id,
+        driver=driver,
+        resource_id=cfg.CONF.router_id,
+        tenant_id=driver._router.tenant_id,
         delete_callback=delete_callback,
         bandwidth_callback=bandwidth_callback,
         worker_context=context,

akanda/rug/test/unit/test_debug.py

@@ -31,20 +31,26 @@ class TestDebug(base.RugTestBase):
         cfg.CONF.unregister_opts(debug.DEBUG_OPTS)
         super(TestDebug, self).tearDown()
 
+    @mock.patch('akanda.rug.drivers.get')
     @mock.patch('akanda.rug.worker.WorkerContext')
     @mock.patch('akanda.rug.state.Automaton')
     @mock.patch('pdb.set_trace')
-    def test_debug_one_router(self, set_trace, automaton, ctx):
+    def test_debug_one_router(self, set_trace, automaton, ctx, drivers_get):
         ctx.return_value.neutron.get_router_detail.return_value = mock.Mock(
             tenant_id='123'
         )
         debug.debug_one_router(self.argv + ['--router-id', 'X'])
 
-        ctx.return_value.neutron.get_router_detail.assert_called_once_with('X')
+        mock_driver = drivers_get.return_value.return_value
+
         assert set_trace.called
+
+        drivers_get.return_value.assert_called_once_with(ctx.return_value, 'X')
+
         automaton.assert_called_once_with(
-            router_id='X',
-            tenant_id='123',
+            driver=mock_driver,
+            resource_id='X',
+            tenant_id=mock_driver._router.tenant_id,
             delete_callback=debug.delete_callback,
             bandwidth_callback=debug.bandwidth_callback,
             worker_context=ctx.return_value,