Updated openstack/openstack
Project: openstack-dev/devstack  67df3b2fc2b2e7b1cfb0418e59f96db7561277be
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Bind Marconi to SERVICE_HOST & add health check

This patch,
1. Binds Marconi to SERVICE_HOST, to be consistent with other services.
2. Adds a health check to verify if marconi started correctly.

Change-Id: I1d48d0e610369cc97d479a5cd47b2bd11656da3f