Summary
When upgrading from 7.8.x to 7.9 the 'you've just been upgraded!' screen shows the incorrect date of upgrade.

Steps to Reproduce
Upgrade from any 7.8.x release to the 7.9 release
Note the time/date of the upgrade shows the time/date of the 7.8.x release and not the 7.9.

Expected Results
Page should show the date/time of the latest patch to avoid confusion in regard to the integrity of the upgrade.

Actual Results
Date of the 7.8.x release is shown instead of the 7.9 version.

Notes

• The upgradeversionhistory table has no record of the 7.9 version.
  
• The following logs are not shown when upgrading the Jira instance
  atlassian-jira.log

  ...
  *******************************************************************
  Upgrade Succeeded! JIRA has been upgraded to build number XXXXX
  *******************************************************************
  ...
  

• Also, there is no upgrade history information in the log (after upgrading to 7.9.x)

  ...
      ___ Upgrade History ________________________
      
           7.8.2#77001
                Time Performed                                : 2018-04-27 06:56:46.83
  ...
  

Workaround
No workaround.