Fix python 3.x related Hacking warnings

Convert print operator usages to print functions.
Fix one instance of outdated "except x,y:" syntactical construct.
Remove usages of local() in string formatting alongway.

Change-Id: Id0673a9183a6ea6bd9bf3f5c6d8e7c5f114ebf01
Added support for running the tests under PyPy with tox

This is a precursor to having them run under check and gate.

Change-Id: I9c2f8218f457aeaa03e06b4a87554fcdc40e4a0a
Merge "Fix python 3.x related Hacking warnings"
Merge "Added support for running the tests under PyPy with tox"