Fixes #4561 Compare task name without role prefix for start-at-task

lib/ansible/callbacks.py

@@ -595,6 +595,11 @@ class PlaybookCallbacks(object):
             if name == self.start_at or fnmatch.fnmatch(name, self.start_at):
                 # we found out match, we can get rid of this now
                 del self.start_at
+            elif self.task.role_name:
+                # handle tasks prefixed with rolenames
+                actual_name = name.split('|', 1)[1].lstrip()
+                if actual_name == self.start_at or fnmatch.fnmatch(actual_name, self.start_at):
+                    del self.start_at
 
         if hasattr(self, 'start_at'): # we still have start_at so skip the task
             self.skip_task = True