overcloud heat metadata endpoints are incorrectly set to localhost

Issue

• When attempting to run this template, the two OS::Heat::SoftwareDeployment's will never complete. If you look at the server it's running os-collect-config forever with this error message:

Jan 17 18:36:53 example-puppet-server-f4kuww7sysxb os-collect-config[6282]: HTTPConnectionPool(host='127.0.0.1', port=8000): Max retries exceeded with url: /v1/?SignatureVersion=2&AWSAccessKeyId=fff52156641542818b981dc0103e63b2&StackName=example-puppet&SignatureMethod=HmacSHA256&Signature=jk%2FB34s5XKGnuTX8ykWAtP1gYTHUuqmU2HAFXlxCNDo%3D&Action=DescribeStackResource&LogicalResourceId=server (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x2091350>: Failed to establish a new connection: [Errno 111] Connection refused',)) 

• And if we review the metadata:

--===============4163561669070312311== 
Content-Type: text/x-cfninitdata; charset="us-ascii"
MIME-Version: 1.0 
Content-Transfer-Encoding: 7bit 
Content-Disposition: attachment; filename="cfn-init-data" 

{"os-collect-config": {"cfn": {"stack_name": "example-puppet", "metadata_url": "http://127.0.0.1:8000/v1/", "path": "server.Metadata", "secret_access_key": "80570f3b2cda46be9bfb8c7f543935bb", "access_key_id": "fff52156641542818b981dc0103e63b2"}, "collectors": ["ec2", "cfn", "local"]}, "deployments": []} 

• [root@overcloud-controller-0 etc]# crudini --get /etc/heat/heat.conf DEFAULT heat_metadata_server_url
  http://127.0.0.1:8000

# URL of the Heat metadata server. NOTE: Setting this is only needed if you
# require instances to use a different endpoint than in the keystone catalog
# (string value)
#heat_metadata_server_url = <None>