Clean up redstack to use SERVICE_HOST

- Cleaned up redstack to use SERVICE_HOST in places where it was
  using localhost, or a hardcoded IP

- Cleaned up client wrappers to OS services which were also using
  hardcoded paths in their connection URLs

Closes-bug: 1278652
Change-Id: I2a284a476dc325c704d2517616b723ac964420d3