commands: report host interface: don't create ifcfg file if not needed

if the interface does not have any conifugration parameters do not
create an empty ifcfg-ifname file inside /etc/sysconfig/network-scripts/
(cherry picked from commit d2d0c366ea382fd16fa1c14b190a097b1fa65a12)
command: report host interface: if infiniband interface do not bridge

In a KVM container node, if the interface name starts with 'ib' do not
do any bridging with the interface.
(cherry picked from commit 1a5ea4f249faf76c8320698f4009197e8fcb9d24)
commands: report interface give wrong MTU with multiple interfs

due to a wrong query rocks report interface reported wrong mtu
value when an interface did not have any subnet assigned