#9433 rebase: Cache the results for the RackSpace dynamic inventory

A future branch might make it configurable.

Also, use old school string interpolation so that the plugin is compatible with
Python < 2.7.

Fixes #11872

Hashicorp Vault lookup Plugin

Openstack inventory updates from Tower.

Openstack inventory updates from Tower.  Includes changes from https://github.com/ansible/ansible/pull/10491 and https://github.com/ansible/ansible/pull/10776.

Adding documentation for ask_vault_pass usage in ansible.cfg

ignore sudo settings for script when become_user is not root
fixes #11902

Before this, they were not listified there but they were listified when
specified like this:

with_lookup: terms

Tiny typo fix

fine tuned password handling as we were getting false positives, probably caused by other changes up the stack that now call these functions in more cases.

New lookup plugin : ini

Add missing $