⬆ Upgrade to django 2.2

Also bump django suit to v2 alpha
Remove python2 transitional support

scripts/ping_service.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 # coding: utf-8
-
+# FIXME: python2
 import os,sys,datetime,argparse,threading,time,Queue
 from commands import getstatusoutput
 

scripts/rrd_graphgen.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 # coding: utf-8
 
+# FIXME: python2
 import os,sys,datetime,argparse,threading,time,Queue
 from commands import getstatusoutput
 

scripts/rrd_service.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 # coding: utf-8
 
+# FIXME: python2
 import os,sys,datetime,argparse,threading,time,Queue
 from commands import getstatusoutput