add ensurepip

tox.ini

@@ -144,6 +144,7 @@ commands =
   python3 -c "import psycopg"
   which python
   which python3
+  python3 -m ensurepip
   sh -c "ansible-test units --color --requirements --target-python default -v --num-workers 1 --coverage --truncate 0 {posargs}"
   ansible-test coverage report --requirements --omit '.tox/*,tests/*' --color --all --show-missing -v --truncate 0
   ansible-test coverage combine --export={envdir}