Added vmi network config testcases
Added vmi network config testcases

Changes:
     -Add Static IP When Host Poweroff And Verify On Poweron
     -Add VMI Static IP When Host Poweroff And Verify Static IP On BMC Reset
     -Enable DHCP When No Static IP Configured And Verify DHCP IP
     -Verify User Cannot Delete VMI DHCP IP Address
     -Enable DHCP When Static IP Configured DHCP Server Unavailable And Verify IP
     -keyword  Set Static IPv4 Address To VMI AND Verify
     -code fix -Keyword name

Change-Id: I439fa7e154be6289a57d4b2737aca88de15a6fb5
Signed-off-by: shrsuman123 <718c928890966c92717ef8b27bd5d130d59afcdb@in.ibm.com>

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