Merge "Debian: using packages for installing Tempest"

run_tests.sh

@@ -249,9 +249,14 @@ $SUDO chown -R "$(id -u):$(id -g)" /tmp/openstack/tempest/
 
 # install from source now on ubuntu until packaged
 if uses_debs; then
-    cd /tmp/openstack/tempest-horizon; $SUDO python setup.py install
+    cd /tmp/openstack/tempest-horizon;
+    if [ $(lsb_release --id -s) = "Debian" ] ; then
+        $SUDO apt-get install -y tempest python3-stestr python3-os-testr python3-tempest
+    else
+        $SUDO python setup.py install
         $SUDO pip install -U stestr os-testr
     fi
+fi
 
 set +e
 # Select what to test: