Remove lvm_backend from computes. Ceph is used

Change-Id: Ifb10c033989e65508e0981f5a486c7b50e4a8fb1
diff --git a/tcp_tests/templates/cookied-cicd-queens-dvr-sl/environment_context.yaml b/tcp_tests/templates/cookied-cicd-queens-dvr-sl/environment_context.yaml
index 6398208..cc1537e 100644
--- a/tcp_tests/templates/cookied-cicd-queens-dvr-sl/environment_context.yaml
+++ b/tcp_tests/templates/cookied-cicd-queens-dvr-sl/environment_context.yaml
@@ -240,7 +240,6 @@
       reclass_storage_name: openstack_compute_rack01
       roles:
       - openstack_compute
-      - features_lvm_backend_volume_vdb
       - linux_system_codename_xenial
       interfaces:
         ens3: