add parent predicate IRI to FileReference so that it can be regenerated
as RDF
manually delete the temp directory to ensure that references to it are
not held after tests complete
downgrade many log.info calls to log.debug
downgrade more log messages
add inline note about bad practice of using src/test/resources/...
directly

must copy the resource out to a temporary directory each time
start migrating temporary file procedure so that it will generally work

in addition, the new method makes it possible to parallelize tests,
which isn't possible with file locks in the previous version
do not create the file if the invalidFileIdentifier parameter is set
fix test failures due to duplicate directories for successive file
creations in a single test
downgrade logging in UUIDPurlProcessorImpl
reduce logging
wrap calls to DebugUtils in log.isDebugEnabled
downgrade some more logging