Adding 'validate_certs' option to EC2 modules

Also removing validate_cert option from the cloudformation module docs,
as it does not use the standard ec2 connection.

Fix broken behavior when removing all auxiliary groups from a user. See #5933 for more details.

Tests by hand correct and passes "make clean tests".

When disabled, the boto connection will be instantiated without validating
the SSL certificate from the target endpoint. This allows the modules to connect
to Eucalyptus instances running with self-signed certs without errors.

Fixes #3978

ec2 module fails when state is not absent

directory detection should now work on BSDs, added AIX alternate path

tagged_instances is initialised in a scope not visible
when state is not absent.

Documentation updates to rax_files, rax_files_objects

Fixes #3688

airbrake: Made the reporting URL an optional parameter

Reverting unarchive tests.

We run into some problems because tar --diff will take into account the file ownership and fail if they don't match.

The real-world implication of this is that we could be doing more unarchives then we need to be doing.

Tell user to make inventory plugin executable

Update doc, irc and mailing list information in manpages input

remove check for version string

this check does not get used anywhere and is not needed as zypper/rpm can handle version information directly

Updates for the unarchive module and action_plugin.

Some small changes to per notes from @mpdehann.

mention that include works with addtional task files

Minor grammar fix in manpages and update docs url.

Mention we can include roles/x/tasks/anothertasks.yml with `include anothertasks.yml` within the role's `main.yml` as this is not obvious from the documentation

There is a bit going on with the changes here. Most of the changes are cleanup of files so that they line up with the standard files.

PR #5136 was merged into the current devel and brought up to working order. A few bug fixes had to be done to get the code to test correctly. Thanks out to @pib!

Issue #5431 was not able to be confirmed as it behaved as expected with a sudo user.

Tests were added via a playbook with archive files to verify functionality.

All tests fire clean including custom playbooks across multiple linux and solaris systems.

Allow hacking/env-setup module path to use config file library path

hacking/env-setup now adds the configured library path in ANSIBLE_CONFIG
to the ANSIBLE_LIBRARY environment variable in addition to the previous
default of ANSIBLE_HOME/library.

This replaces #5950.

rax_facts and rax_keypair modules: update docs

Fixes #4821