test/py: Make print statements python 3.x safe

In python 3.x print must be called as a function rather than used as a
statement. Update uses of print to the function call syntax in order to
be python 3.x safe.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>

test/py/conftest.py

@@ -586,7 +586,7 @@ def pytest_runtest_protocol(item, nextitem):
         # is fixed, if this exception still exists, it will then be logged as
         # part of the test's stdout.
         import traceback
-        print 'Exception occurred while logging runtest status:'
+        print('Exception occurred while logging runtest status:')
         traceback.print_exc()
         # FIXME: Can we force a test failure here?