solves Issue8533 Rerun failed test with maven and junit5 creates the wrong command line.

[homberghp]

This fix reformats the test property passed to the MavenCommandLineExecutor
by replacing occurrences of f.q.c.n.TestClass#f.q.c.n.TestClass.testMethod with
f.q.c.n.TestClass#testMethod.

The location where this fix is applied might not be ideal, because the wrongly formatted test property
is composed elsewhere, however inside the MavenCommandLineExecutor we are sure that it is used for maven.

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