kolla-ansible can take globals.yml from any directory by using
--config-dir argument. So store admin credentials there as well.

Not everyone runs kolla-ansible as a root.

Change-Id: I0709482ead4b7a67e82796e17f85bde151e71bc0

Add config_owner_user and config_owner_group to group_vars/all,
which is user and group of Kolla configuration files in /etc/kolla.

Add become to post-deploy playbook.

Add become to only neccesary tasks in roles:
- certificate
- common
- destroy
- haproxy
- mariadb
- memcached
- rabbitmq

Change-Id: I2aba745a6e3928c52642f64551470fd08cbfd058
Partial-Implements: blueprint ansible-specific-task-become

The admin-openrc.sh should copy to where the python-openstackclient was installed.
whatever multinode and all-in-one, the place where python-openstackclient was
installed is localhost, So admin-openrc.sh should copy to localhost.
The purpose of "connection: local" in ansible playbook is that make sure this script
can copy to localhost.In all-in-one, Writting as this is ok, it will copy to localhost,
but in multinode, this will make a bug, add ansible_connection=ssh in inventory file
the admin-openrc.sh will not copy to the localhost,the "connection:local" in post-deploy.yml
will be covered by "ansible_connection=ssh" in inventory file, then the script will be copied
to target node. So we should modify the hosts to localhost to avoid this bug.

Change-Id: I054717cc2b4adc600808282034a10a58c1184a38
Closes-Bug: #1666808

This task is run as a post-deploy playbook

Implements: blueprint ansible-task-generate-openrc
Change-Id: I69f4ee895094da5c73494a41dccb2e86eb481656