[autotest] Refactor lab_status_unittest.py for simplification.

This changes the code that generates the various test values to use
a helper function rather than raw JSON strings.

BUG=None
TEST=Run the unit tests

Change-Id: I039fe720c99b54d56b03c9f6f6e8019c1a03d075
Reviewed-on: https://chromium-review.googlesource.com/280579
Commit-Queue: Richard Barnette <jrbarnette@chromium.org>
Tested-by: Richard Barnette <jrbarnette@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
1 file changed