[Security] Implement bandit

Bandit (https://github.com/openstack/bandit) is a python
security linter.

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

bandit.sh

@@ -0,0 +1,12 @@
+#!/bin/bash -xe
+# Runs bandit tests
+
+pyver="$(python -V 2>&1)"
+
+if [[ $pyver =~ Python\ 2\.6 ]]
+then
+    echo 'Bandit does not support python 2.6'
+else
+    bandit -r puppetboard
+    bandit -r tests
+fi