Fix bug 2149

Set appropriate delete method for
cluster role bindings in case of exception

Change-Id: I187ec50dbec37ed9ff51e18234ab51e02c42ce40
Signed-off-by: Patricia Reinoso <patricia.reinoso@canonical.com>
diff --git a/n2vc/k8s_juju_conn.py b/n2vc/k8s_juju_conn.py
index 396d79b..6708748 100644
--- a/n2vc/k8s_juju_conn.py
+++ b/n2vc/k8s_juju_conn.py
@@ -156,7 +156,7 @@
             self.log.debug("Role binding created")
             cleanup_data.append(
                 {
-                    "delete": kubectl.delete_service_account,
+                    "delete": kubectl.delete_cluster_role_binding,
                     "args": (metadata_name,),
                 }
             )