Previous version of keystone reconfigure fails at adding fernet
components to fact variable "keystone_item".
Ansible can not create fact variable using newly created variable
in a same task.
This patch set split this task into two tasks, first create variable
containing fernet components, then merge it to "keystone_item".
Change-Id: I15571ab20d6104d30350e8b922401b462336fca0
Closes-Bug: #1636047
8c8e296ecf