python-docker 7.x compatibility

`assert_hostname` argument is no longer accepted

Signed-off-by: Tomas Tomecek <[email protected]>

sen/docker_backend.py

@@ -791,7 +791,7 @@ def __init__(self):
         self._df = None
 
         kwargs = {"version": "auto"}
-        kwargs.update(docker.utils.kwargs_from_env(assert_hostname=False))
+        kwargs.update(docker.utils.kwargs_from_env())
 
         try:
             APIClientClass = docker.Client  # 1.x