Backed out changeset 6dd2c9e510a3

pytest-html is installed on the system, and not available in the tox
environment. Thus this commit should be backout.

templates/tests/py27.yml

 ---
 py27:
   before_script:
-    - pip install tox pytest-html
+    - pip install tox
   stage: tests
@@ -5,4 +5,4 @@
   stage: tests
-  script: tox -e py27 -- --html=py3.html --self-contained-html
+  script: tox -e py27
   artifacts:
     paths:
@@ -7,4 +7,3 @@
   artifacts:
     paths:
-      - py27.html
       - py27-deprecated-warnings.json

templates/tests/py3.yml

 ---
 py3:
   before_script:
-    - pip install tox pytest-html
+    - pip install tox
   stage: tests
@@ -5,7 +5,7 @@
   stage: tests
-  script: tox -e py3 -- --junitxml=report.xml --html=py3.html --self-contained-html
+  script: tox -e py3 -- --junitxml=report.xml
   artifacts:
     when: always
     reports:
       junit: report.xml
     paths:
@@ -7,7 +7,6 @@
   artifacts:
     when: always
     reports:
       junit: report.xml
     paths:
-      - py3.html
       - py3-deprecated-warnings.json