Taking a page out of the ec2 config, make sure that all of the
OpenStack modules handle the inbound auth config in the same way.
The one outlier is keystone wrt auth_url.

The OpenStack client utilities consume a set of input environment
variables for things like username and auth_url, so it's very
common for OpenStack users to have such settings set in their
environment. Indeed, things like devstack also output a shell file
to be sourced to set them. Although in a playbook it's entirely
expected that variables should be used to pass in system settings
like api passwords, for ad-hoc command line usage, needing to pass
in five parameters which are almost certainly in the environment
already reduces the utility.

Grab the environment variables and inject them as default. Special care
is taken to ensure that in the case where the values are not found, the
behavior of which parameters are required is not altered.

Removed max 8192 bytes, fixes #8424

Updated docs for health_check_type parameter.

The run_command module function will now poll stdout/stderr for
data rather than using the builtin command communicate(), which can
hang under certain circumstances.

Fixes #7452
Fixes #7748
Fixes #8163

Fixes #8330

Envirionment variable support in GCE inventory plugin.

Fix a typo in gem module documentation

Fixes issue #8339 where Scientific Linux incorrectly tries to use Fedora...

Fixes #8169

Include unicode and var_precedence tests in 'all' target

The ansible PyPi package, and RPM both require crypto>=2.6.  This change
carries that dependency into the ansible DEB package.  Note, for
ubuntu-12.04, this dependency is only satisfied by a PPA.  Users
installing from 'ppa:ansible/ansible' will not be affected..

Revert "Use atomic move function on known host file in paramiko to prevent rare occurance of Control-C"

This reverts commit 642b183f.

Fixes #8394

This reverts commit cbdc9f11.

Code needs to make allowances for particular python versions and try/except
around this block.

Fixes #8425

during file operations.

Update version.

"allow_no_value=True" for ini_file module

Adding test Coverage for mysql_variable module

Add support for environment variables in GCE module.

Use mysql_variable to query, set and update variables.
Assert using user and password to query, set and update  variables.
Assert using single quotes, double quotes and no quotes  when using variables

filter_leading_non_json_lines effectively does

re.match(".*\w+=\w+.*", line)

for every line of output. This has abysmal performance in case of large
Base64-encoded data (which ultimately does not match the regex but does
match the .*\w+= part) as returned e.g. by the template module (diffs).

Replacing the match with

re.search("\w=\w", line)

drops the complexity back to linear, and actually usable with large
diffs from the template module (a 150 KB Base64 diff kept Ansible
spinning at 100% cpu for minutes).

Also, check the easy cases (line.startswith) first while we're here.

Closes: #8932

ec2 module: document valid states

Make ec2_group module not just fail