heat use https issue

Hi all,

We are using Heat behand LB, and here is the topology:
User --https--> LB --http--> Heat-api

And we already enable ssl middleware in heat-api.

When we run "heat stack-show XXX", we got the following error:
Prohibited endpoint redirect location = https://heatapi.qa.webex.com/v1/81a13ac5f0734c0e8229c0b8ad374861/stacks/hello_heat_stack/d779f41e-649b-4edf-88fb-6945fd5f0e90

This problem is because we have the following heat-api endpoint in keystone:
https://heatapi.qa.webex.com:443/v1/81a13ac5f0734c0e8229c0b8ad374861

In the endpoint we have ":443", and heatclient it compared location and endpoint directly:
https://github.com/openstack/python-heatclient/blob/master/heatclient/common/http.py#L207-215

After we modify the endpoint to :
https://heatapi.qa.webex.com/v1/81a13ac5f0734c0e8229c0b8ad374861

It can work well...