Added new network test cases.
Added new network test cases.

Resolves openbmc/openbmc-test-automation#1770

Signed-off-by: Prashanth Katti <def1213b2b853506bc42999227c7ced90b83bfd2@in.ibm.com>
Change-Id: I86d3ea1ecbb976d05381ccd179e55cc0a6199ee6

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