Bok-choy upgrade, LMS tests, cleanup

Fix an issue with cache being cleared for bok_choy fast test
Change text in bok_choy scripts to green
Added feedback check for AI-assessment test
Added peer assessment feedback test
Updated Studio/LMS page objects and tests to use bok-choy v0.1.0
Added LMS bok-choy tests from e2e repo

@jzoldak This is some cleanup I did while working on the peer grading bok-choy tests.  I figured there were enough changes to spin off into a separate PR.