NoClassDefFoundError from EventListenerModuleDescriptor

Issue

A NoClassDefFoundError is being thrown when a plugin tries to register a license listener using the PluginLicenseEventRegistry.

java.lang.NoClassDefFoundError: com/atlassian/plugin/eventlistener/descriptors/EventListenerModuleDescriptor

Cause

In Bitbucket Server 4.11.0, the atlassian-event version was bumped from 3.0.0 to 3.1.3. Version 3.1.3 requires EventListenerModuleDescriptor, which is exported in atlassian-plugins-core from version 4.4.0 onward. However, EventListenerModuleDescriptor is not exported in atlassian-plugins-core version 4.2.4, which is being used by Bitbucket Server 4.11.0.