Fix registry dependency for container jobs (#1152)

diff --git a/zuul.d/container-images/nova-ssh.yaml b/zuul.d/container-images/nova-ssh.yaml
index d7801c1..3650306 100644
--- a/zuul.d/container-images/nova-ssh.yaml
+++ b/zuul.d/container-images/nova-ssh.yaml
@@ -27,6 +27,8 @@
     name: atmosphere-build-container-image-nova-ssh
     parent: atmosphere-build-container-image
     dependencies:
+      - name: atmosphere-buildset-registry
+        soft: false
       - name: atmosphere-build-container-image-ubuntu
         soft: true
       - name: atmosphere-build-container-image-ubuntu-cloud-archive
@@ -56,6 +58,8 @@
     name: atmosphere-upload-container-image-nova-ssh
     parent: atmosphere-upload-container-image
     dependencies:
+      - name: atmosphere-buildset-registry
+        soft: false
       - name: atmosphere-upload-container-image-ubuntu
         soft: true
       - name: atmosphere-upload-container-image-ubuntu-cloud-archive