[SDFAB-1197] First stab to update ONOS to py3

Update has been performed only on the scripts and the
executables strictly necessary for the following use cases:

- Build (including Intellij)
- Tests (including Intellij)
- Docker build (including dev and yourkit)
- Upload snapshot (including local)
- Release

Finally, fix the ability to run ONOS using onos-local targets,
stc and docker stc (aka up4 stc env). Last but not least, updated
the azul image to a newer one which exports also the PYTHONENCODING

Change-Id: Ie96f3a9c76dbba83b1fc3896a372f1045d3d7ccc
diff --git a/tools/dev/bash_profile b/tools/dev/bash_profile
index eaff4b3..f6a9543 100644
--- a/tools/dev/bash_profile
+++ b/tools/dev/bash_profile
@@ -77,7 +77,7 @@
 alias ole='olo "ERROR|WARN|Exception|Error"'
 
 # Pretty-print JSON output
-alias pp='python -m json.tool'
+alias pp='python3 -m json.tool'
 
 # Short-hand to launch Java API docs, REST API docs and ONOS GUI
 alias docs='open $ONOS_ROOT/docs/target/site/apidocs/index.html'