Code to check newly added DNS server configuration.
Code to check newly added DNS server configuration.

Resolves openbmc/openbmc-test-automation#1867

Signed-off-by: Prashanth Katti <def1213b2b853506bc42999227c7ced90b83bfd2@in.ibm.com>
Change-Id: I3191a26960c933347cf7b496cdb28aaf9c28bf93

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