network: updated network configuration

Updated network configuration for matching new
requirements for vdsm and ovirt-engine.
Fixes permissions on network scripts files.

Change-Id: I17f6df9a8fa5c74b8110d9db593601aad1b7af32
Bug-Url: https://bugzilla.redhat.com/1139687
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>