Add support for Python 3

DaVinciTests/tests/options/CommonParticles/DVTestStandardIntermediate.py

@@ -23,10 +23,9 @@ from Gaudi.Configuration import *
 #
 from CommonParticles import StandardBasic
 from CommonParticles import StandardIntermediate
-import six
 
 Locations = []
-for a,b in six.iteritems(StandardIntermediate.locations):
+for a,b in StandardIntermediate.locations.items():
     print("DVTestCommonParticles adding location", a)
     Locations.append(a)