[GR-5233] Package test analyzer improvements.

...acle/truffle/r/test/packages/analyzer/FileTreeWalker.java

.../com/oracle/truffle/r/test/packages/analyzer/PTAMain.java

.../com/oracle/truffle/r/test/packages/analyzer/Problem.java

.../truffle/r/test/packages/analyzer/detectors/Detector.java

...ffle/r/test/packages/analyzer/detectors/DiffDetector.java

...kages/analyzer/detectors/InstallationProblemDetector.java

...le/r/test/packages/analyzer/detectors/RErrorDetector.java

...t/packages/analyzer/detectors/RInternalErrorDetector.java

.../r/test/packages/analyzer/detectors/SegfaultDetector.java

...analyzer/detectors/UnsupportedSpecializationDetector.java

...truffle/r/test/packages/analyzer/dump/AbstractDumper.java

...le/truffle/r/test/packages/analyzer/dump/HTMLBuilder.java

...cle/truffle/r/test/packages/analyzer/dump/HTMLDumper.java

...acle/truffle/r/test/packages/analyzer/model/RPackage.java

...uffle/r/test/packages/analyzer/model/RPackageTestRun.java

...e/truffle/r/test/packages/analyzer/parser/DiffParser.java

.../test/packages/analyzer/parser/LogFileParseException.java

...ruffle/r/test/packages/analyzer/parser/LogFileParser.java

...le/truffle/r/test/packages/analyzer/test/PatternTest.java

...fle/r/test/packages/analyzer/test/RErrorDetectorTest.java