Ansible inventory

Support for ANSIBLE_HOSTS is faded out, see commit
c7325454, therefore do not mention it in
the man pages.

Add become docs to the intro configuration for #10881

add azure integration tests

now properly inherit data from ansible.cfg for sudo/su ask pass

fixes #10891

cloudstack: integration tests

clarify role spec, dependencies and galaxy involvment.

cloudstack: add dynamic inventory

cloudstack: extend and fix cloudstack utils

Add lineinfile integration tests for quoted string

Fix pylint error on "cachefile does not exist"

Since cachefile is used to show the error message when stat
fail, the variable need to be declared.

Tweak vault description

Vault isn't specifically for source control. Make description a little more generic and descriptive.

Update intro_dynamic_inventory.rst

Examples of special characters being converted to underscores for clarity.

Allow the use of HTTP on custom ports in the fetch_url function