Tests: improve reporting when running with tox

Generate a short report at the end of each test run and a self-contained
HTML report, too.

Signed-off-by: Hunor Csomortáni <csomh@redhat.com>

tox.ini

@@ -73,6 +73,7 @@ deps =
     kobo
     koji
     pytest
+    pytest-html
     pytest-xdist
     PyYAML
     requests
@@ -81,4 +82,9 @@ deps =
 # if the instance tested has a self-signed certificate.
 passenv = REQUESTS_CA_BUNDLE MBS_TEST_CONFIG MBS_TEST_WORKERS HOME
 commands =
-    pytest -vv --confcutdir=tests/integration -n {env:MBS_TEST_WORKERS:0} {posargs:tests/integration}
+    pytest -rA -vv \
+        --confcutdir=tests/integration \
+        -n {env:MBS_TEST_WORKERS:0} \
+        --html=report.html \
+        --self-contained-html \
+        {posargs:tests/integration}