Bitbucket/Confluence/Jira is prevented from correctly shutting down when ScriptRunner is installed

When ScriptRunner is installed, running stop-service.bat/stop-confluence.sh will not successfully stop the Bitbucket application process, examining thread dumps this appears to be due to ExecutorService executors and their associated threads not being shutdown when the plugin is disabled.

The source of the above executors appears to be our internal analytics library, which is not shutting down its executors when the plugin disables.

Due to this, the customer must forcefully kill the related process, rather than using the preferable Windows/Linux service mechanisms.