Use tmpdir and avoid leaving test files behind
Use tmpdir and avoid leaving test files behind

 We were just creating a file for testing iscsi persist files and
 weren't cleaning up after the test.

 Change this to use a tmpdir and make sure we leave no tracks.

 Fixes bug #1050086

Change-Id: I714177d7789da8b628ab63c163a2c3f1698dd940

n0ano/gantt,n0ano/gantt