skip list and remove extra flavor

Author: scrungus

.automation.conf/tempest/skip-lists/magnum

@@ -0,0 +1 @@
+magnum_tempest_plugin.tests.api.v1.test_cluster.ClusterTest.test_create_cluster_with_zero_nodes[id-262eb132-a857-11e9-9382-00224d6b7bc1,positive,slow]: "Test is invalid (skipped upstream)" 

etc/kayobe/ansible/scripts/aio-magnum-init.sh

@@ -17,7 +17,6 @@ if ! $KOLLA_OPENSTACK_COMMAND flavor list | grep -q ds2G20; then
   $KOLLA_OPENSTACK_COMMAND flavor create ds4G20 --ram 4096 --disk 20 --id d6 --vcpus 4 --public
 fi
 
-$KOLLA_OPENSTACK_COMMAND flavor create ds2G20 --ram 2048 --disk 20 --id d5 --vcpus 2 --public
 if ! $KOLLA_OPENSTACK_COMMAND image list | grep -q ubuntu-2004-kube-v1.26.0; then
   echo Downloading ubuntu k8s image..