Enable snapshot deletion with deps on ceph

This is not be a problem anymore with newer ceph
and devstack-plugin-ceph has been setting the minimum
client version to mimic (which enables the required features)
for a while.
So use the new variable which references volume/image
dependencies but it is really about volume dependencies.

Change-Id: I673497466b0fb6f7954aebe05ee6d1bd24e78769
diff --git a/zuul.d/project.yaml b/zuul.d/project.yaml
index c652fe0..e284487 100644
--- a/zuul.d/project.yaml
+++ b/zuul.d/project.yaml
@@ -103,9 +103,7 @@
         - tempest-full-enforce-scope-new-defaults:
             irrelevant-files: *tempest-irrelevant-files
         - devstack-plugin-ceph-tempest-py3:
-            # TODO(kopecmartin): make it voting once the below bug is fixed
-            # https://bugs.launchpad.net/devstack-plugin-ceph/+bug/1975648
-            voting: false
+            timeout: 9000
             irrelevant-files: *tempest-irrelevant-files
         - neutron-ovs-grenade-multinode:
             irrelevant-files: *tempest-irrelevant-files