Revert "Merge pull request #2831 from dimagi/revert-vellum"

This reverts commit b3345eae872e9c3c3810ac2f78757a6523a0d6f2, reversing
changes made to 5be1de723d3563157dbe9d6aa4fbc58dca80376e.
Merge branch 'master' into vellum-includes

Conflicts:
	corehq/apps/app_manager/templates/app_manager/form_designer.html
Added ability to remove unassigned user role.
add user registration attachment xml to app.json
only ignore data in root
add auto-select model
autoselect in suite.xml
pep8
check case tag in autoselect
add raw autoselect
use build id instead of app id for the submit url
optimized health status report
remove unnecessary code
auto select ui
extended users mapping and refactored query
allow subscriptions and accounts to be marked for trials
skip invoicing for trial subscriptions
don’t send subscription ending reminder emails for trial subscriptions. We’re going to handle these differently
display trial status on current subscription page
add new domains to a 30 day trial of advanced (currently feature flagged)