The Module Service Container module, 'org.jboss.msc,' requires a grants for the permission 'org.jboss.as.server.security.ServerPermission' with the name 'setCurrentServiceContainer'. However it doesn't not declare a dependency on the 'org.jboss.as.server' module which contains that permission class. Because of this, the grant is silently ignored and not granted.
One needs to add a dependency on the module in order to be able to start EAP 7 Beta. This should be logged for the developer to find the cause of the grant failure.