Ignore "device does not exist" error from facter
Ensure tunneling disabled
Update entire neutron dir

Update the entire neutron directory with the contents
from the latest stable/icehouse branch to avoid a divergence
between components.
Fix location of facter error checker
Restart openvswitch on centos before agent

Fix issue where agent times out waiting for
br-tun to settle.
Restart metadata service, lower report_interval
Correct check for facter error