Turn off function generator on aborted test

BUG=b:148627899
TEST=Run tests, stopping at various points.  Function generator turns
off.

Change-Id: Iefb85c57fa920a1353c4dc3b3d4cc5b6a452ac1d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/optofidelity_TPPT/+/2702772
Reviewed-by: Sean O'Brien <seobrien@chromium.org>
Commit-Queue: Sean O'Brien <seobrien@chromium.org>
Tested-by: Sean O'Brien <seobrien@chromium.org>
2 files changed