RFR: Merge jmc:master [v2]

[Marcus Hirt]

> Prepping for release.

Marcus Hirt has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 29 commits:

 - Merge branch 'master' into jmc8 in preparation for the 8.3 release.
 - 7877: Update the jmc version in jmc8 branch to 8.2.1
   
   Reviewed-by: aptmac, clanger
 - 7381: Better descriptions for reports
 - 7443: Wrong version in THIRDPARTYREADME
   
   Reviewed-by: hirt
 - 7569: Improve the implementation of Twitter plugin
   
   Reviewed-by: hirt
 - 7561: Update to the release splash screen for JMC 8.2
   
   Reviewed-by: hdafgard
 - Merge branch 'master' into jmc8
 - 7436: Update version to 8.1.1 in the jmc8 branch
   
   Reviewed-by: hdafgard
 - 7231: JMC createReport for JMC8 Automated Analysis fails to evaluate several rules
   
   Reviewed-by: hirt, hdafgard
 - 7419: Update XML parsing
   
   Reviewed-by: hirt
 - ... and 19 more: https://git.openjdk.org/jmc/compare/095d0687...cb24f0a8

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Changes: https://git.openjdk.org/jmc/pull/440/files
 Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=440&range=01
  Stats: 23 lines in 1 file changed: 23 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jmc/pull/440.diff
  Fetch: git fetch https://git.openjdk.org/jmc pull/440/head:pull/440

PR: https://git.openjdk.org/jmc/pull/440