bisect-kit: Add UUID when leasing VM

Adding a UUID to avoid creating duplicate instances due to timeout
issue.

BUG=b:326332743
TEST=manually

Change-Id: I3d6f96bb12434d1546c75850e769b0c63a1c4937
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/bisect-kit/+/5409962
Reviewed-by: Cheng-Yu Lee <cylee@google.com>
Commit-Queue: Zheng-Jie Chang <zjchang@chromium.org>
Tested-by: Zheng-Jie Chang <zjchang@chromium.org>
1 file changed