Append connector type to all EDID files in display_EdidStress

BUG=chromium:427436
TEST=run the test on nyan_big

Change-Id: I49fbbc02774eb064a30bd874f5e03d5b75237bc9
Reviewed-on: https://chromium-review.googlesource.com/225592
Tested-by: Hung-ying Tyan <tyanh@chromium.org>
Reviewed-by: Kalin Stoyanov <kalin@chromium.org>
Commit-Queue: Hung-ying Tyan <tyanh@chromium.org>
10 files changed