Add integration bridge to the nova.conf

This is needed when running the compute service with
vSphere as virt backend, and Neutron as networking
solution.

Fixes bug #1200677

Change-Id: Iff01559be437d1409c13224574458d23a1edd1a4
QPID default host

Using SERVICE_HOST as a default QPID_HOST.

Change-Id: I65df0ea4be7df37d4d6f22591b175870808a5c84
Merge "Add integration bridge to the nova.conf"
Merge "QPID default host"