PY3: Fix use of dict.iteritems().

Author: asavoy

UniversalAnalytics/Tracker.py

@@ -313,7 +313,7 @@ def send(self, hittype, *args, **data):
     # dimensions/metrics)
     def set(self, name, value=None):
         if isinstance(name, dict):
-            for key, value in name.iteritems():
+            for key, value in six.iteritems(name):
                 try:
                     param, value = self.coerceParameter(key, value)
                     self.params[param] = value

test/test_everything.py

@@ -56,7 +56,9 @@ def testTrackerOptionsBasic(self):
     def testPersistentCampaignSettings(self):
         # Apply campaign settings
         self.tracker.set('campaignName', 'testing-campaign')
-        self.tracker.set('campaignMedium', 'testing-medium')
+        self.tracker.set({
+            'campaignMedium': 'testing-medium'
+        })
         self.tracker['campaignSource'] = 'test-source'
 
         self.assertEqual(self.tracker.params['cn'], 'testing-campaign')