Allow --vault-password-file to work with a script as well as a flat file

Rax Guide: Add RackConnect and Managed Cloud automation check examples

rax_keypair module: Allow public_key to be a path to a file

rax module: Support config_drive and user_data

extra varsiables based on playbook basedir.

mysql_db: Fix error message for #6214

Correct regex in is_keyid

Fixed tracebacks during VM creation. Fixes #8067.

The `rpm_key` module claims to take a key ID as an argument, however it fails if one is actually given:

    msg: Not a valid key DEADBEEF

The reason for this is the regular expression in the `RpmKey.is_keyid` method is incorrect; it will only match the literal string "0-9a-f" exactly 8 times, rather than exactly 8 characters in the set 0-9 or a-f.

Added exception handling to database creation and deletion. Fixes #8075.

Switched primary and alias names of the name/db parameter. Fixes #8065.

Fixed tracebacks when datacenter not found, when notes not given, and when collecting facts after VM creation. Fixes #8067.

Adding a Collins inventory script for Ansible

Remove unused code

Bug Fix - fixed the choices typo got the ec2_asg module

Regexes were being parsed like ordinary ansible host patterns, so
square-bracket groups were getting interpolated wrongly.

Makes ansible fail if login_port is defined and login_host is either not...