podman upgrade tests

Initial validation of using podman-in-podman to create an
old-podman root, then use new-podman to play with the
containers created therein.

Signed-off-by: Ed Santiago <santiago@redhat.com>

test/upgrade/helpers.bash

@@ -0,0 +1,11 @@
+# -*- bash -*-
+
+load "../system/helpers"
+
+setup() {
+    :
+}
+
+teardown() {
+    :
+}