Merge remote-tracking branch 'remotes/ehabkost/tags/python-next-pull-request' into...

Python queue, 2018-03-12

# gpg: Signature made Mon 12 Mar 2018 22:10:36 GMT
# gpg:                using RSA key 2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>"
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/python-next-pull-request:
  device-crash-test: Use 'python' binary
  qmp.py: Encode json data before sending
  qemu.py: Use items() instead of iteritems()
  device-crash-test: New known crashes

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>