Switch testing to Victoria testing runtime

Upating the testing template from ussuri to victoria
testing runtime
- https://governance.openstack.org/tc/reference/runtimes/victoria.html

Change-Id: Ifd65c0359509a4b59f3e876c42cef7cbf6f9ef93
diff --git a/setup.cfg b/setup.cfg
index b99f7f2..e4b9f91 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -19,6 +19,7 @@
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
 
 [files]
 packages =