Adapt to scheduler changes in openwhisk. (#135)

- The scheduler PR apache/openwhisk#5031 introduced changes that required adaption in the setup of the openwhisk environment used for the automated tests.

Author: falkzoll

ansible/environments/local/hosts

@@ -30,3 +30,6 @@ db
 
 [apigateway]
 172.17.0.1          ansible_host=172.17.0.1 ansible_connection=local
+
+[etcd]
+etcd0            ansible_host=172.17.0.1 ansible_connection=local