Migrating to Python v3

 - support for Python v3.8.x
 - support for Python v3.5.x
 - new tag, 2019.2.8
 - updates class generation and iterators
 - unittests updated with coverage >75%
 - new coverage routines
 - unittests profiling
 - full fake data for unittests
 - unittest testrun is ~1.5 seconds long

Bugfixes
 - 34834, proper use of 'sudo' option
 - multiple proper iterator use
 - 37919, show warning when installed and candidate versions
   are newer comparing to release version

Change-Id: Idd6b889f7ce94ae0c832e2f0a0346e4fdc3264a3
Related-PROD: PROD-34834 PROD-34664 PROD-34919
diff --git a/scripts/ping.py b/scripts/ping.py
index 4e2778d..fae4f65 100644
--- a/scripts/ping.py
+++ b/scripts/ping.py
@@ -122,7 +122,7 @@
         pool = Pool(15)
         # prepare threaded map
         _param_map = []
-        for _node, _data in _packets.iteritems():
+        for _node, _data in _packets.items():
             if isinstance(_data, list):
                 for target in _data:
                     _param_map.append(target)