Fix #181: Call PMD via java directly, don't use pmd.bat anymore #187
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The culprit is the '&' character in the workspace path...
If not within quotes, this is interpreted as conditional operator -> https://ss64.com/nt/syntax-conditional.html
This PR changes now how we call PMD: we don't use pmd.bat anymore, so we don't need to think about when to quote, what to quote or escape (cmdline behave different then batch file execution in terms of quoting...).
This also enables us to use a PMD distribution without pmd.bat, see #177 .
This additionally fixes a problem with the jrePath - I think, this didn't work for a while. Now we have also a test for that configuration option.