Add __future__ imports and __metaclass__ for automationhub

This patch is needed to pass Automation Hub tests.

roles/ipaclient/library/ipaclient_get_otp.py

@@ -20,6 +20,10 @@
 # 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
+
 ANSIBLE_METADATA = {'metadata_version': '1.0',
                     'status': ['preview'],
                     'supported_by': 'community'}