Modified keyword 'Get Network Configuration'
Modified keyword 'Get Network Configuration'

Let user to specify Ethernet Interface name by channel number while
running, if not, the channel number default is 1.

Signed-off-by: Tony Lee <39789b450c786ba33eb2c19b3da697ab6ba83d1e@quantatw.com>
Change-Id: I02131688a6c7bf3c383dfa51ee97fe7501b04b42

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