Description of problem:

heat-engine.log throws errors of missing with designateclient module

Version-Release number of selected component (if applicable):
heat-cfntools-1.2.8-2.el7.noarch
openstack-heat-engine-5.0.0-1.el7ost.noarch
python-heatclient-0.8.0-1.el7ost.noarch
openstack-heat-api-cfn-5.0.0-1.el7ost.noarch
openstack-heat-common-5.0.0-1.el7ost.noarch
openstack-heat-api-cloudwatch-5.0.0-1.el7ost.noarch
openstack-heat-api-5.0.0-1.el7ost.noarch


How reproducible:
100%

Steps to Reproduce:
1..deploy the overcloud as described in http://file.tlv.redhat.com/~rrasouli/rhos8
2.overcloud deployment fails with the error code 6, login to one of the controllers 
3.look for errors in heat* logs

Actual results:
Deployment fails heat complains for missing modules 


Expected results:
no errors and successful deployment 


Additional info:

2015-12-28 03:49:26.734 4825 ERROR stevedore.extension [-] Could not load 'designate.domain': No module named designateclient
2015-12-28 03:49:26.734 4825 ERROR stevedore.extension [-] No module named designateclient
2015-12-28 03:49:26.734 4825 ERROR stevedore.extension Traceback (most recent call last):
2015-12-28 03:49:26.734 4825 ERROR stevedore.extension   File "/usr/lib/python2.7/site-packages/stevedore/extension.py", line 162, in _load_plugins
2015-12-28 03:49:26.734 4825 ERROR stevedore.extension     verify_requirements,
2015-12-28 03:49:26.734 4825 ERROR stevedore.extension   File "/usr/lib/python2.7/site-packages/stevedore/extension.py", line 185, in _load_one_plugin
2015-12-28 03:49:26.734 4825 ERROR stevedore.extension     plugin = ep.load(require=verify_requirements)
2015-12-28 03:49:26.734 4825 ERROR stevedore.extension   File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2260, in load
2015-12-28 03:49:26.734 4825 ERROR stevedore.extension     entry = __import__(self.module_name, globals(),globals(), ['__name__'])
2015-12-28 03:49:26.734 4825 ERROR stevedore.extension   File "/usr/lib/python2.7/site-packages/heat/engine/clients/os/designate.py", line 14, in <module>
2015-12-28 03:49:26.734 4825 ERROR stevedore.extension     from designateclient import exceptions
2015-12-28 03:49:26.734 4825 ERROR stevedore.extension ImportError: No module named designateclient