added private addressing test method to instancetest.py
added private addressing test method to instancetest.py

nagyistoce/eutester,nephomaniac/eutester,tbeckham/eutester,shaon/eutester,sjones4/eutester,nagyistoce/eutester,nephomaniac/eutester,shaon/eutester,tbeckham/eutester,nagyistoce/eutester,sjones4/eutester,nephomaniac/eutester,nephomaniac/nephoria,nagyistoce/eutester,shaon/eutester,tbeckham/eutester,nephomaniac/nephoria,sjones4/eutester,tbeckham/eutester,shaon/eutester,sjones4/eutester