tweak AsyncSnapd api slightly

also remove dry-run delay for requests to /v2/change/{id}

subiquity/server/controllers/refresh.py

@@ -213,9 +213,9 @@ class RefreshController(SubiquityController):
 
     @with_context()
     async def start_update(self, context):
-        change = await self.app.snapd.post(
+        change = (await self.app.snapd.post(
             'v2/snaps/{}'.format(self.snap_name),
-            {'action': 'refresh', 'ignore-running': True})
+            {'action': 'refresh', 'ignore-running': True}))['change']
         context.description = "change id: {}".format(change)
         return change
 

subiquitycore/snapd.py

@@ -152,7 +152,8 @@ class FakeSnapdConnection:
             "Don't know how to fake POST response to {}".format((path, args)))
 
     def get(self, path, **args):
-        time.sleep(1/self.scale_factor)
+        if 'change' not in path:
+            time.sleep(1/self.scale_factor)
         filename = path.replace('/', '-')
         if args:
             filename += '-' + urlencode(sorted(args.items()))
@@ -184,10 +185,10 @@ class AsyncSnapd:
         response = await run_in_thread(
             partial(self.connection.post, path, body, **args))
         response.raise_for_status()
-        return response.json()['change']
+        return response.json()
 
     async def post_and_wait(self, path, body, **args):
-        change = await self.post(path, body, **args)
+        change = (await self.post(path, body, **args))['change']
         change_path = 'v2/changes/{}'.format(change)
         while True:
             result = await self.get(change_path)