Add an index to compute_node_stats

This will improve the performance of scheduler lookups of compute nodes
and their associated stats.

bug 1177487

Change-Id: I0e04849543916e874ea0ddfc76c3d70ff71c09d0
libvirt: ignore NOSTATE in resume_state_on_host_boot() method.

Occasionally, libvirt would get NOSTATE from hypervisor as instance
state. Thus if we don't ignore instances in NOSTATE in
resume_state_on_host_boot() method, we would mistakenly reboot such
instances when we restart nova-compute service or on host boot. This
patch fixes this by adding NOSTATE into ignored_states.

Bug 1176897

Change-Id: I651cb043d7f97fde29b2a62e6ead8222062f01f7
Transition from openstack.common.setup to pbr.

Declarative approach to packaging, obviates the need for copying files.
Also, removes the need for setup.py to import files from the nova
module.

./run_tests.sh now ensure's that nova.egg-info/entry_points.txt is up to
date before running tests.

Change-Id: I7b7a18e065a62491ade54fbed5d8400db1d4e6c7
Imported Translations from Transifex

Change-Id: Ic42793b5844219cdc2dfed82a5e3b8aad0d88136
Merge "Add an index to compute_node_stats"
Merge "libvirt: ignore NOSTATE in resume_state_on_host_boot() method."
Merge "Transition from openstack.common.setup to pbr."