Revert "unblock build for beta release"
Revert "unblock build for beta release"

this was a bundler bug: https://github.com/rubygems/rubygems/issues/4547
fixed by forcing build to install before caching

This reverts commit d675c3c5bde27d04d3aa81b00c7f506d4b284601.

Change-Id: Ib336e846bcbf967bf7f089ac99d5611f751bcdc2
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/263242
Reviewed-by: Jacob Burroughs <8ecea6e385af5cf9f53123f5ca17fb5fd6a6d4b2@instructure.com>
Tested-by: Ethan Vizitei <73eeb0b2f65d05a906adf3b21ee1f9f5a2aa3c1c@instructure.com>
QA-Review: Ethan Vizitei <73eeb0b2f65d05a906adf3b21ee1f9f5a2aa3c1c@instructure.com>
Product-Review: Ethan Vizitei <73eeb0b2f65d05a906adf3b21ee1f9f5a2aa3c1c@instructure.com>

sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms