JIRA used to have context-listeners that did things on startup. These have been converted from ServletContextListener
to JiraLauncher. Instead of contextInitialized and contextDestroyed they now implement start() and stop(). This allows
us to decouple JIRA creation from context creation and gives us further flexibility about when exactly bits of the
start up occur.
Called during JIRA "startup".
Despite no longer being multitenant, it is still a good idea to chunk this. The order is defined
The logic for ordering all of this will be handled by the DefaultJiraLauncher.