Scan fails if AuxClasspath contains non-existing files

[ybroeker]

ERROR - plication.impl.ApplicationImpl - java.nio.file.NoSuchFileException: /usr/lib/jvm/java-11-openjfx/lib 
java.lang.RuntimeException: java.nio.file.NoSuchFileException: /usr/lib/jvm/java-11-openjfx/lib
	at net.sourceforge.pmd.cache.AbstractAnalysisCache.getClassPathEntries(AbstractAnalysisCache.java:210)
	at net.sourceforge.pmd.cache.AbstractAnalysisCache.checkValidity(AbstractAnalysisCache.java:146)
	at net.sourceforge.pmd.processor.AbstractPMDProcessor.processFiles(AbstractPMDProcessor.java:115)
	at com.github.ybroeker.pmdidea.pmdwrapper.PmdRunner.run(PmdRunner.java:111)
	at com.github.ybroeker.pmdidea.pmdwrapper.PmdWrapperImpl.runPmd(PmdWrapperImpl.java:46)
	at com.github.ybroeker.pmdidea.pmd.PmdAdapterDelegate.runPmd(PmdAdapterDelegate.java:30)
	at com.github.ybroeker.pmdidea.actions.scan.AbstractScanAction.lambda$actionPerformed$0(AbstractScanAction.java:89)
	at com.intellij.util.RunnableCallable.call(RunnableCallable.java:20)
	at com.intellij.util.RunnableCallable.call(RunnableCallable.java:11)
	at com.intellij.openapi.application.impl.ApplicationImpl$1.call(ApplicationImpl.java:268)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:668)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:665)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:665)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.nio.file.NoSuchFileException: /usr/lib/jvm/java-11-openjfx/lib
	at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:92)
	at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
	at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116)
	at java.base/sun.nio.fs.UnixFileAttributeViews$Basic.readAttributes(UnixFileAttributeViews.java:55)
	at java.base/sun.nio.fs.UnixFileSystemProvider.readAttributes(UnixFileSystemProvider.java:149)
	at java.base/sun.nio.fs.LinuxFileSystemProvider.readAttributes(LinuxFileSystemProvider.java:99)
	at java.base/java.nio.file.Files.readAttributes(Files.java:1763)
	at java.base/java.nio.file.FileTreeWalker.getAttributes(FileTreeWalker.java:225)
	at java.base/java.nio.file.FileTreeWalker.visit(FileTreeWalker.java:276)
	at java.base/java.nio.file.FileTreeWalker.walk(FileTreeWalker.java:322)
	at java.base/java.nio.file.Files.walkFileTree(Files.java:2716)
	at net.sourceforge.pmd.cache.AbstractAnalysisCache.getClassPathEntries(AbstractAnalysisCache.java:199)
	... 17 more
ERROR - plication.impl.ApplicationImpl - IntelliJ IDEA 2020.2.3  Build #IC-202.7660.26 
ERROR - plication.impl.ApplicationImpl - JDK: 11.0.8; VM: OpenJDK 64-Bit Server VM; Vendor: N/A 
ERROR - plication.impl.ApplicationImpl - OS: Linux 
ERROR - plication.impl.ApplicationImpl - Plugin to blame: PMD-IDEA version: 1.3.2 
ERROR - plication.impl.ApplicationImpl - Last Action: PmdScanProjectAction