Manila tests use sudo all over the place and while the only
configured user in the test image is root, it's easier to
fake the sudo binary than to modify test code to know when
to sudo and when to not.
Also remove 2 mkdir calls that are obviated by the new file
getting copied in those directories.
Change-Id: Ib0cbe05130bc617154bf471e2ecc0a78b2bb8377