java-16

Fix the DateTimeKataDisplayNames to drop the "verify" from the JUnit output. Fix the none.cvg.datetime.DateTimeKataDisplayNames#generateDisplayNameForMethod() to render text from substring after 'verify'. See similar example at: none.cvg.handles.HandlesKataDisplayNames#generateDisplayNameForMethod in java-handles.

After the implementation of the Entity_Identifier_Service, the console showed following error, stating that there is an IllegalArgumentException in conjunction with "main".

Exception in thread "main" java.lang.IllegalArgumentException: Listener must implement EventListener
	at net.dv8tion.jda.api.hooks.InterfacedEventManager.register(InterfacedEventManager.java:62)
	at net.dv8tion.jda.in