GHSA-94QW-R73X-J7HG Users with ROLE_COURSE_ADMIN can create new users in Opencast

Impact Users with the role ROLECOURSEADMIN can use the user-utils endpoint to create new users not including the role ROLEADMIN. For example: bash Use the admin to create a new user with ROLECOURSEADMIN using the admin user. We expect this to work. % curl -i -u admin:opencast...