This should include anything I've sent so far (not including the RFC for
more exploratory changes) that hasn't already been included in a roundup
by Alex Bennée.

Mostly, it removes unused docker files and replaces python2 with python3
in all of the container environments.

V2:
- Rolled in python2 --> python3 conversion
- Added travis conversion to python patch
- Remove debian8 dockerfile, which is also now unused.

John Snow (5):
  docker: move tests from python2 to python3
  docker: remove 'deprecated' image definitions
  docker: remove debian8-mxe definitions
  docker: remove unused debian-sid and debian-ports
  docker: removed unused debian8 partial image

 tests/docker/Makefile.include                 |  8 ++---
 tests/docker/dockerfiles/centos7.docker       |  2 +-
 tests/docker/dockerfiles/debian-ports.docker  |  2 +-
 tests/docker/dockerfiles/debian-sid.docker    |  2 +-
 .../dockerfiles/debian-xtensa-cross.docker    |  2 +-
 tests/docker/dockerfiles/debian10.docker      |  2 +-
 tests/docker/dockerfiles/debian8.docker       | 34 -------------------
 tests/docker/dockerfiles/debian9.docker       |  2 +-
 tests/docker/dockerfiles/travis.docker        |  2 +-
 tests/docker/dockerfiles/ubuntu.docker        |  2 +-
 tests/docker/dockerfiles/ubuntu1804.docker    |  2 +-
 11 files changed, 12 insertions(+), 48 deletions(-)
 delete mode 100644 tests/docker/dockerfiles/debian8.docker

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2.21.0