QPOP:fixed read config

Fixed the empty fixtureID that caused the creation of incorrect Tast command.

BUG=350879967
FIXED=350879967
TEST= python QPOP.py -c docking -ip <DUT>

Change-Id: Ic3bb66be3bc64acf4689c614aa746d37c92699be
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/5667323
Tested-by: James Chen <jameschen19010@allion.corp-partner.google.com>
Auto-Submit: James Chen <jameschen19010@allion.corp-partner.google.com>
Reviewed-by: Ricky Chang <rickytlchang@chromium.org>
Commit-Queue: Ricky Chang <rickytlchang@chromium.org>
1 file changed