dhcp_configuration: Use the correct file for DHCP settings

Now that we are writing settings per interface, we should only look at
settings for that interface itself, not the latest file in the network
directory.

Change-Id: I51910a28cac7fa8b876d4c2c28617023f24ed61a
Signed-off-by: William A. Kennington III <wak@google.com>
1 file changed