ci(ovn): add verification tests for database (#1048)

Signed-off-by: Mohammed Naser <mnaser@vexxhost.com>
diff --git a/test-requirements.txt b/test-requirements.txt
new file mode 100644
index 0000000..408284d
--- /dev/null
+++ b/test-requirements.txt
@@ -0,0 +1,6 @@
+kubernetes
+molecule
+molecule-plugins[docker]
+oslotest
+stestr
+testscenarios