Use print_function __future__ import

Rather than continuing to use the old print statement, use the actual
print function introduced in python 2.6. See:

  http://docs.python.org/2/whatsnew/2.6.html#pep-3105-print-as-a-function

Change-Id: I059d982d60e13f13e1caf49509c0fe0b18eda723
Merge "Use print_function __future__ import"