Contrail API in multi_tenancy mode exposes port 8095 (a knob now)
on which an admin could view from controller host only. This patch
enforces a local auth check from the contrail-api.conf. So for e.g
following access would work -
curl -u <admin_user>:<admin_password> http://localhost:8095/

This assumes that contrail-api.conf (or containing dir) is only
root-readable.

Change-Id: Ifae94ffe6d7772b41d5771268a3f4cc4f030f560
Merge "Contrail API in multi_tenancy mode exposes port 8095 (a knob now) on which an admin could view from controller host only. This patch enforces a local auth check from the contrail-api.conf. So for e.g following access would work - curl -u <admin_user>:<admin_password> http://localhost:8095/"