Update machine_manager.py to deal with new 'ifconfig' output.

BUG=None
TEST=Tested in on updated lab parrot machines and it worked.

Change-Id: I709989a977130bbeeb667e825acdc874c6bfaf50
Reviewed-on: https://chrome-internal-review.googlesource.com/148714
Reviewed-by: Yunlian Jiang <yunlian@google.com>
Commit-Queue: Caroline Tice <cmtice@google.com>
Tested-by: Caroline Tice <cmtice@google.com>
Reviewed-by: Bhaskar Janakiraman <bjanakiraman@google.com>
1 file changed