Add __future__ imports and __metaclass__ for automationhub

This patch is needed to pass Automation Hub tests.

roles/ipaclient/action_plugins/ipaclient_get_otp.py

@@ -17,6 +17,10 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+from __future__ import (absolute_import, division, print_function)
+
+__metaclass__ = type
+
 try:
     import gssapi
 except ImportError: