Run VMTests with "-F /dev/null -i /dev/null" ssh arguments

These arguments will disable a lot of unncessary parsing and checking of
malformed keys in the ~/.ssh/ directory, which I believe are responsible
for the `Connection timed out during banner exchange` failures we are
seeing in VMTest.

CQ-DEPEND=CL:Ib19fe8c378ae71f5c5432f82f919fd761a10ca80
BUG=chromium:254166
TEST=Trybot

Change-Id: Iadfa46c9fc843fa2e86ff2eb901018b096b24958
Reviewed-on: https://chromium-review.googlesource.com/168120
Tested-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: Chris Sosa <sosa@chromium.org>
Commit-Queue: Aviv Keshet <akeshet@chromium.org>
1 file changed