Installer does not upgrade existing installed Bundled JRE's

Summary

An installed Bundled JRE does not get updated when an installer with a newer Bundled JRE is run. This is for an update or install on a system with no manual or custom install of Java. This means once a Bundled JRE is installed, Bitbucket will use only this version until a user upgrade/installs Java manually.

Steps to Reproduce

1. Install Bitbucket Server using the installer on a system without Java.
2. Upgrade Bitbucket Server to a newer version / install a fresh Bitbucket server instance using an installer with a newer JRE bundled.

Expected Results

1. The installed Bundled JRE should have been upgraded to the newer Bundled JRE

Actual Results

1. The installer uses the old JRE location and does not extract the newer JRE

Workaround

Install the new JRE version manually.