[autotest] Guard orphaned crash collection with a try, except.

Since we're seeing a couple of errors finding orphaned crash dumps
move the try except block up one level. This is only a temporary
solution till the related bugs are resolved.

TEST=Ran the method with a host and raised an exception.
BUG=chromium:231747

Change-Id: I96d642c4ec3074d7f71918d073cc184a3695fc95
Reviewed-on: https://chromium-review.googlesource.com/168968
Tested-by: Prashanth Balasubramanian <beeps@chromium.org>
Reviewed-by: Dan Shi <dshi@chromium.org>
Commit-Queue: Prashanth Balasubramanian <beeps@chromium.org>
1 file changed