Fixes JERSEY-2515 - after checking that it is possible to create files in java.io.tmpdir by attempting to create a file there, it should be deleted immediately
JERSEY-2515 Moving test into MultiPartReaderWriterTest as per pull-request feedback. Trying to find the right place to create temporary directory and set java.io.tmp, ended up as static field and creating/deleting in @BeforeClass/@AfterClass.
JERSEY-2515 Set java.io.tmpdir back to the original value once we're done
Merge pull request #96 from vetler/task/JERSEY-2515-should-not-leave-temporary-files

Fixes JERSEY-2515 - after checking that it is possible to create files i...