Code to handle new VMI changes
Code to handle new VMI changes

Changes:
    1. VMI network changes will be effective runtime
    2. Added proper gateway address
    3. Added timer to wait for verifying network changes

Signed-off-by: Prashanth Katti <def1213b2b853506bc42999227c7ced90b83bfd2@in.ibm.com>
Change-Id: I9e02be7b8413ae596977be663e4e96165a95cecd

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation