Update cinder and keystone charm channel

Change-Id: I3fe4fa1843984933d3bd1b32bc6c472e6c0ed3f1
diff --git a/tests/bundles/focal-ussuri.yaml b/tests/bundles/focal-ussuri.yaml
index 95d58c8..284e1c5 100644
--- a/tests/bundles/focal-ussuri.yaml
+++ b/tests/bundles/focal-ussuri.yaml
@@ -48,7 +48,7 @@
       - 'lxd:3'
   keystone:
     charm: ch:keystone
-    channel: latest/stable
+    channel: ussuri/stable
     options:
       openstack-origin: *openstack-origin
     num_units: 1
@@ -59,7 +59,7 @@
     channel: 8.0/stable
   cinder:
     charm: ch:cinder
-    channel: latest/stable
+    channel: ussuri/stable
     num_units: 1
     options:
       openstack-origin: *openstack-origin
diff --git a/tests/bundles/focal-wallaby.yaml b/tests/bundles/focal-wallaby.yaml
index ce28aee..312546d 100644
--- a/tests/bundles/focal-wallaby.yaml
+++ b/tests/bundles/focal-wallaby.yaml
@@ -47,7 +47,7 @@
       - 'lxd:3'
   keystone:
     charm: ch:keystone
-    channel: latest/stable
+    channel: wallaby/stable
     options:
       openstack-origin: *openstack-origin
     num_units: 1
@@ -58,7 +58,7 @@
     channel: 8.0/stable
   cinder:
     charm: ch:cinder
-    channel: latest/stable
+    channel: wallaby/stable
     num_units: 1
     options:
       openstack-origin: *openstack-origin