allow logged-in users to launch account tools

 - create a tool with an account level launch
 - log in as a teacher
 - the teacher should be able to launch the tool

fixes PLAT-690

Change-Id: Ie58f79aabb26ea64597ade476046a8c9bd221430
Reviewed-on: https://gerrit.instructure.com/43272
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Bracken Mosbacker <bracken@instructure.com>
Product-Review: Bracken Mosbacker <bracken@instructure.com>
QA-Review: Caleb Guanzon <cguanzon@instructure.com>