moved docker import inside test

Author: tclose

pydra/environments/tests/test_environments.py

@@ -1,6 +1,5 @@
 from pathlib import Path
 import typing as ty
-import docker as docker_engine
 from pydra.environments import native, docker, singularity
 from pydra.engine.submitter import Submitter
 from fileformats.generic import File
@@ -511,6 +510,8 @@ def newcache(x):
 def test_entrypoint(tmp_path):
     """docker env: task with a file in the output"""
 
+    import docker as docker_engine
+
     dc = docker_engine.from_env()
 
     # Create executable that runs validator then produces some mock output