Remove all redundant setUp() methods

Remove all redundant setUp() methods from tests, they can be added
as needed.

Change-Id: Id9a62f4183ae99fa4c92ae0813ba46de51aca26b
Correct "returns" line in PXE deploy method

What it says.

Change-Id: I9772f56d74ace22fb36e1ddfba0a348c006d22d5
Closes-Bug: 1387873
Merge "Remove all redundant setUp() methods"