hdctools: servoflex_test_v2.py: modify to use servoflex_v2 for 50pin.

Modify the test script to include the XML config file for the 50<->50
pin servoflex V2 cable.

BUG=chrome-os-partner:10626
TEST=manual
1. Connect 50<->50 servoflex to V2 test board and Servo V2 connector
2. python ./servoflex_test_v2.py -p 50
Result:Test passes.

Change-Id: Ie3937b7a9f98c63d0f77ab8242b7e1faf50f26c0
Reviewed-on: https://gerrit.chromium.org/gerrit/25593
Reviewed-by: Mark Hayter <mdhayter@chromium.org>
Commit-Ready: Todd Broch <tbroch@chromium.org>
Tested-by: Todd Broch <tbroch@chromium.org>
1 file changed