remove bandit B322 check

The check for this call to input() has been removed.
The input method in Python 2 will read from standard input, evaluate and
run the resulting string as python source code. This is similar, though
in many ways worse, than using eval. On Python 2, use raw_input instead,
input is safe in Python 3.

Change-Id: I8654f0c197bfe88796b56e9d85f563cdded6e8a8

tox.ini

@@ -26,7 +26,7 @@ passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 commands =
     doc8 doc/source/ CONTRIBUTING.rst HACKING.rst README.rst
     flake8
-    bandit -r watcher -x watcher/tests/* -n5 -ll -s B320,B322
+    bandit -r watcher -x watcher/tests/* -n5 -ll -s B320
 
 [testenv:venv]
 setenv = PYTHONHASHSEED=0