Add mandatory container_mode to reproducer script

Reproducer playbook requires container_mode, set it for 'podman'
by default.
Change-Id: If764a36d76278d303e07177b41d11db7370c5c87

roles/create-zuul-based-reproducer/templates/reproducer-zuul-based-quickstart.sh.j2

@@ -18,6 +18,7 @@
 : ${UPSTREAM_GERRIT_SSH_KEY:="id_rsa"}
 : ${RDO_GERRIT_SSH_KEY:="id_rsa"}
 : ${EXTRA_PARAMS:=""}
+: ${CONTAINER_MODE:="podman"}
 
 usage () {
     echo "Usage: $0 [options]"
@@ -146,6 +147,11 @@ while [ "x$1" != "x" ]; do
             shift
             ;;
 
+        --container-cli|-cont)
+            CONTAINER_MODE=$2
+            shift
+            ;;
+
         --help|-h)
             usage
             exit
@@ -195,7 +201,8 @@ install_package_deps_via_bindep
 # Ensure pip is updated
 sudo pip install --upgrade pip
 
-if [ -x "/usr/bin/docker" ] ; then
+if [[ "$CONTAINER_CLI" == "docker"]]; then
+    if [ -x "/usr/bin/docker" ] ; then
         # Fail as early as possible if the docker
         # group is not setup appropriately.
         # This has to be done AFTER package intalls.
@@ -234,6 +241,7 @@ if [ -x "/usr/bin/docker" ] ; then
 
         # Ensure the docker process has been restarted
         sudo systemctl restart docker
+    fi
 fi
 
 # Start from a clean workspace
@@ -298,10 +306,10 @@ if [[ "$RDO_GERRIT_SSH_KEY" != "$USER_SSH_KEY" ]]; then
     EXTRA_PARAMS="$EXTRA_PARAMS -e rdo_gerrit_key=$RDO_GERRIT_SSH_KEY "
 fi
 
-
 # Run the launcher playbook
 PATH=${HOME}/.local/bin:$PATH ansible-playbook \
     $WORKSPACE/launcher-playbook.yaml \
+    -e container_mode="$CONTAINER_MODE" \
     -vv \
     --tags all \
     ${EXTRA_PARAMS[@]}