Horizon full_ha cannot connect to heat-api

The Orchestration Stacks tab in horizon currently displays a failure
connecting to the VIP for heat-api when using the full_ha scenario.

Set up the load balancer for heat-api to resolve.

Closes-Bug: #1274112
Merge pull request #12 from CiscoSystems/bugs/1274112

Horizon full_ha cannot connect to heat-api