Move Loadbalancer Noop driver to the unit tests

Move Loadbalancer Noop driver to the corresponding folder in
unit tests to clearly indicate that it is an utility driver
that only suitable for unit testing.

Closes-Bug: #1250767
Change-Id: Ide2ebf212193f2cf5da9cf7a7f068fd918a55ada
Merge "Move Loadbalancer Noop driver to the unit tests"