Updated from global requirements

*Matching global requirements
*Add the six module:
  1. see link https://github.com/stackforge/murano-agent/blob/master/muranoagent/openstack/common/gettextutils.py line 38
  2. see link https://github.com/stackforge/murano-agent/blob/master/muranoagent/openstack/common/jsonutils.py line 47
  3. see link https://github.com/stackforge/murano-agent/blob/master/muranoagent/openstack/common/timeutils.py line 27
Change-Id: Ie1409b7506262875aa077d484cf56871edf5e481