Add python3-compat boilerplate to all .py files in lib/ansible

lib/ansible/utils/shlex.py

@@ -15,7 +15,9 @@
 # You should have received a copy of the GNU General Public License
 # alongwith Ansible.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import absolute_import
+# Make coding more python3-ish
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
 
 import shlex
 from ansible.compat.six import PY3