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
do_reconfigure.yml is introduced to use serial directive. But we use
it in wrong. Now serial has moved to playbook file. So it is time to
remove the do_reconfigure.yml file
Closes-Bug: #1628152
Change-Id: I8d42d27e6bc302a0e575b0353956eaef9b2ca9fd
Useful for upgrade etc., which is preferablly done serially.
Example usage: tools/kolla-ansible deploy OR tools/kolla-ansible upgrade
Closes-Bug: #1576708
DocImpact
Change-Id: I34b2e16f8ce53e472a4682a4738c4ac0f5abf00c
Run the keystone reconfigure only when inventory_hostname in
groups['keystone']
Partially-implements: bp kolla-reconfig
Change-Id: I9d4b5f39f2d68cfd2ae087e3f8a2ee4785eb9586