python: futurize -f lib2to3.fixes.fix_has_key

Change "dict.has_key(key)" to "key in dict"

This is necessary for Python 3 compatibility.

Done using:

  $ py=$( (g grep -l -E '^#!.*python';find -name '*.py' -printf '%P\n';) | \
    sort -u | grep -v README.sh4)
  $ futurize -w -f lib2to3.fixes.fix_has_key $py

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20180608122952.2009-5-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

scripts/qmp/qom-list

@@ -45,7 +45,7 @@ if len(args) > 0:
         args = args[2:]
 
 if not socket_path:
-    if os.environ.has_key('QMP_SOCKET'):
+    if 'QMP_SOCKET' in os.environ:
         socket_path = os.environ['QMP_SOCKET']
     else:
         usage_error("no QMP socket path or address given");