[stable-2.6] Relax ansible-test python version checking.

(cherry picked from commit d6cc3c4187)

Co-authored-by: Matt Clay <matt@mystile.com>

test/runner/versions.py

@@ -9,7 +9,7 @@ try:
 except ImportError:
     pip = None
 
-print(sys.version)
+print('.'.join(u'%s' % i for i in sys.version_info))
 
 if pip:
     print('pip %s from %s' % (pip.__version__, os.path.dirname(pip.__file__)))