tests: replace another shell script.

tests/ansible/mitogen_ansible_playbook.py

@@ -0,0 +1,6 @@
+#!/usr/bin/env python
+import os
+import subprocess
+import sys
+os.environ['ANSIBLE_STRATEGY'] = 'mitogen_linear'
+subprocess.check_call(['./run_ansible_playbook.py'] + sys.argv[1:])

tests/ansible/mitogen_ansible_playbook.sh

@@ -1,3 +0,0 @@
-#!/bin/bash
-export ANSIBLE_STRATEGY=mitogen_linear
-exec ./run_ansible_playbook.py "$@"