Open issues with commits filter from the release plan is not working well for bugfix/LTS releases

The jira filter generated for the Verify that there are no JIRA issues with commits for this branch and that are not closed step in the release plan generates the previous release date for the X.Y-rc-Z version, instead of X.Y.Z-1, when releasing a bugfix/LTS version X.Y.Z.

Also, issues labeled with flickering should not be counted.

Example expected result for 10.11.11:
https://jira.xwiki.org/issues/?jql=category%20%3D%2010000%20and%20(labels%20is%20empty%20or%20labels%20not%20in%20(%22flickering%22))%20and%20resolution%20%3D%20Unresolved%20and%20issue.property%5Bdevelopment%5D.commits%20%3E%200%20and%20updated%20%3E%20%222019-11-13%22

Actual result was:
https://jira.xwiki.org/issues/?jql=category%20%3D%2010000%20and%20resolution%20%3D%20Unresolved%20and%20issue.property%5Bdevelopment%5D.commits%20%3E%200%20and%20updated%20%3E%20%222018-12-18%22
(using the release date of 10.11-rc-1).