Update SHA for xblock-submit-and-compare
Update SHA for xblock-submit-and-compare

This commit brings the stanford dependency
on xblock-submit-and-compare to the most recent version.
The version bump adds a tox dependency on opaque_keys 0.1.2,
so that the version used by the test environment matches
the version used by Stanford-Online's fork of edx-platform

Stanford-Online/edx-platform,caesar2164/edx-platform,Stanford-Online/edx-platform,Stanford-Online/edx-platform,caesar2164/edx-platform,caesar2164/edx-platform,Stanford-Online/edx-platform,caesar2164/edx-platform