ansible: add connection delegation test targets.

For command line use only, no integration tests yet.

tests/ansible/hosts

@@ -1,3 +1,16 @@
 
 [test-targets]
 localhost
+
+[connection-delegation-test]
+cd-bastion
+cd-rack11 mitogen_via=ssh-user@cd-bastion
+cd-rack11a mitogen_via=root@cd-rack11
+cd-rack11a-docker mitogen_via=docker-admin@cd-rack11a ansible_connection=docker
+
+[connection-delegation-cycle]
+# Create cycle with Docker container.
+cdc-bastion mitogen_via=cdc-rack11a-docker
+cdc-rack11 mitogen_via=ssh-user@cdc-bastion
+cdc-rack11a mitogen_via=root@cdc-rack11
+cdc-rack11a-docker mitogen_via=docker-admin@cdc-rack11a ansible_connection=docker