Revert "Proper passing of SUDO flag for neutron functional tests"

This reverts commit 2aeade43c36bd1bd2a88dd114dd874f0c470a587.

Change-Id: I85b51a0bfece5cd26d097cae154b06eded952086
Closes-Bug: #1336172
Merge "Revert "Proper passing of SUDO flag for neutron functional tests""