MULE-7490 - Removing FilePersistenceTestCase which was failing because depends on the old way to store queue files. This test is not necessary because the same is tested in several other test cases - Only calling delete on temporary folder for working directory when it has a root if not fails when an assumption is false since for some reason junit do not calls the @before methods but calls the @after methods
Merge pull request #555 from mulesoft/MULE-7490

MULE-7490 - Removing FilePersistenceTestCase which was failing because d...