Add debian/tests/control to run testsuite under autopkgtest

debian/changelog

@@ -14,6 +14,7 @@ python-junit-xml (1.9-1) UNRELEASED; urgency=medium
   * Bump Standards-Version to 4.5.0; no changes needed
   * debian/control: run tests with pytest. Upstream changed setup.py in a way
     that relying on setup.py test no longer works.
+  * Add debian/tests/control to run testsuite under autopkgtest
 
  -- Antonio Terceiro <terceiro@debian.org>  Mon, 13 Jul 2020 10:28:03 -0300
 

debian/tests/control

+Test-Command: cp -r tests/ $AUTOPKGTEST_TMP
+  && cd $AUTOPKGTEST_TMP
+  && python3 -m pytest
+Depends: @, python3-pytest