Links to JIRA Issues are created based on Application-URL and not on Display-URL

Related issue: https://jira.atlassian.com/browse/CONF-22283

Display URL is configured when configuring Application Link in the Confluence admin panel. This URL is used when displaying JIRA links in Confluence in the browser.

But Team Calendars links to JIRA issues using the Application URL and not the Display URL.

Steps to Reproduce

1. Create a project on JIRA, with an issue that has a due date
2. Set up an Application Link between Confluence and JIRA by navigating to Confluence Admin >> Application Links, make sure the Display URL is different than the Application URL.
3. Add a JIRA calendar to Team Calendars using this guide: http://confluence.atlassian.com/display/TEAMCAL/Adding+a+JIRA+Calendar
4. Make sure that you are able to see the issue you created in Step 1 in your Team Calendars.
5. Hover over the issue, right click and copy link address. Notice that the link is based on the Application URL and not the Display URL in step 2.