tests: switch to using podman instead of docker

Note: use podman-docker to avoid changing tests too much. This
is also what we have on the RHEL branches.

There's no service to be started/restarted so remove everything
related to docker service.

Cherry-picked from e1b45958f4

Related: rhbz#1770193

test/vm.install

@@ -81,4 +81,11 @@ rpm -e --verbose $(basename -a ${packages[@]} | sed 's/-[0-9].*.rpm$//') || true
 yum install -y $packages
 
 systemctl enable lorax-composer.socket
-systemctl enable docker.service
+
+if [ -f /usr/bin/docker ]; then
+    yum remove -y $(rpm -qf /usr/bin/docker)
+fi
+
+if ! rpm -q podman-docker; then
+    yum install -y podman-docker
+fi

tests/cli/test_compose_tar.sh

@@ -18,7 +18,6 @@ CLI="${CLI:-./src/bin/composer-cli}"
 rlJournalStart
     rlPhaseStartSetup
         rlAssertExists /usr/bin/docker
-        rlRun -t -c "systemctl restart docker"
     rlPhaseEnd
 
     rlPhaseStartTest "compose start"
@@ -31,14 +30,6 @@ rlJournalStart
 
     rlPhaseStartTest "compose finished"
         wait_for_compose $UUID
-
-        # Running a compose can lead to a different selinux policy in the
-        # kernel, which may break docker. Reload the policy from the host and
-        # restart docker as a workaround.
-        # See https://bugzilla.redhat.com/show_bug.cgi?id=1711813
-        semodule -R
-        systemctl restart docker
-
         rlRun -t -c "$CLI compose image $UUID"
         IMAGE="$UUID-root.tar.xz"
     rlPhaseEnd