converts assignments/peer_reviews js_block into js_include

test plan:
* regression test assignment peer reviews

Change-Id: I647dc902943e3f3ed3553cc4ab89e80903a96b4a
Reviewed-on: https://gerrit.instructure.com/29170
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jon Jensen <jon@instructure.com>
QA-Review: Caleb Guanzon <cguanzon@instructure.com>
Product-Review: Landon Wilkins <lwilkins@instructure.com>