Fix a test on Ruby trunk
Created by: yui-knk
In Ruby 2.5, top-level constant look-up through a qualified constant is not permitted.
see: https://github.com/ruby/ruby/commit/44a2576f798b07139adde2d279e48fdbe71a0148
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: yui-knk
In Ruby 2.5, top-level constant look-up through a qualified constant is not permitted.
see: https://github.com/ruby/ruby/commit/44a2576f798b07139adde2d279e48fdbe71a0148