Add JUnit XML test reports to CI; use stock Python test image

.gitlab-ci.yml

@@ -4,13 +4,10 @@ stages:
 
 test:
   stage: test
-  image: "debian:stable"
-  before_script: []
+  image: registry.git.autistici.org/ai3/docker/test/python:master
   script:
-    - apt-get update
-    - env DEBIAN_FRONTEND=noninteractive apt-get -qy install python3 python3-setuptools python3-pip tox git
     - tox
   artifacts:
     reports:
       cobertura: coverage.xml
-
+      junit: nosetests.xml

tox.ini

@@ -9,6 +9,6 @@ deps=
   nose
   mock
 commands=
-  nosetests -vv --with-coverage --cover-package=ai_web_common --cover-erase --cover-html --cover-html-dir=htmlcov []
+  nosetests -vv --with-xunit --with-coverage --cover-package=ai_web_common --cover-erase --cover-html --cover-html-dir=htmlcov []
   coverage xml