[Task] Remove sniff Generic.CodeAnalysis.UnusedFunctionParameter from standard

Have a look at http://forge.typo3.org/issues/42276 for more informations why this happens.

Fixes: #42276
Release: 0.0.7
[TASK] Remove TYPO3SniffPool.Files.LowercasedFilename from standard

Fixes: #50199
Release: 0.0.7
[TASK] Exclude a few files of ext phpunit from the standard

Fixes: #50205
Release: 0.0.7
[CLEANUP] Rename the composer custom installer