Quick fix for failing PAX tests.

This test removes TestHelper that was copied from controller.
There are several drawbacks of current usage of PAX, that this commit
is not solving:
* several abstract classes, each defines its own configuration that is hard
to merge into TestHelper
* PAX in general is not helpful when dealing with resolvation and other errors
* these tests are not run with the actual distribution

Change-Id: Ib4304b3bf3d7e0f0dd33322f0f53de294e66f53f
Signed-off-by: Tomas Olvecky <tolvecky@cisco.com>