converts facebook/settings js_block into js_bundle

test plan:
* regression test facebook settings

Change-Id: I8a316e899fdb10f2ffd4671f30cee331f2631dd4
Reviewed-on: https://gerrit.instructure.com/29149
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jon Jensen <jon@instructure.com>
QA-Review: Matt Fairbourn <mfairbourn@instructure.com>
Product-Review: Landon Wilkins <lwilkins@instructure.com>