Release Plan for version 4.2-milestone-1

•  Verify that the xwiki-commons's top level POM has a xwiki.clirr.previous.version property correctly pointing to the latest release (for that branch) and if not, change it and ensure that all the CLIRR excludes are correct and remove those that are no longer valid.
•  Verify that there are no open issues on JIRA for version 4.2-milestone-1
•  Verify that no tests are failing on the CI Server (or that failures are understood).
•  Verify that there are no missing documentation for closed JIRA issues for version 4.2-milestone-1
•  Ensure that the Release Notes are complete and nice-looking for version 4.2-milestone-1
• Release JIRA versions for the following JIRA projects:
  • Commons JIRA
  • Rendering JIRA
  • Platform JIRA
  • Enterprise JIRA
  • Enterprise Manager JIRA
•  Since the release is performed on agent-1, mark it offline in the  Jenkins admin screen. Put as comment Temporarily marking agent-1 offline for the release of 4.2-milestone-1.
• Log on the release machine, set up your identity and update the release scripts
• Update translations
• Build the release
• Clean up your identity
•  Mark agent-1 online again in the  Jenkins admin screen (button on the right).
• Publish CLIRR reports in the Release Notes for version 4.2-milestone-1
• Push distribution files to OW2 and release them
•  Update the XE Download page
•  Update the XEM Download page
•  Ensure that there's a line pointing to the Release Notes for version 4.2-milestone-1 on the Release Notes home page
• Publish news on OW2
• Create blog post on xwiki.org
• Update the API doc
•  Update Wikipedia (en), Wikipedia (fr) and Wikipedia (compare wiki software)
• FreeCode (you can check previous releases)
• Wikimatrix
• Announcement Mail
•  Announce on Twitter with the xwikiorg account
•  Add yourself to the Release Manager Roster page
•  Update the release date on the Roadmap page for non bugfix releases
• Push Commons and Rendering to Maven Central