Don't commit the error during getting of DHCP value

When network manager comes up, it parses the file to
get the dhcp value from the config file,if DHCP key is
not there then don't commit the error.

Resolves openbmc/openbmc#2011

Change-Id: Ic86454a3502096cae2edbb9afe917f5567aa84a6
Signed-off-by: Ratan Gupta <ratagupt@in.ibm.com>
2 files changed