Implement setting IPv4 configuration on target
Implement setting IPv4 configuration on target

As a complement to the previous change to read network configuration data, accept configuration
input and submit to the BMC.

Change-Id: I3d29237c98943fc93c160450861ac9c5d8e7758d

openstack/pyghmi,benoit-canet/pyghmi,openstack/pyghmi,stackforge/pyghmi