ec2 inventory: Verify that a security group exists before trying to use its name as a key in inventory.

fixed shebang in openshift inventory

Fixed so that we no longer check with the remote if a checkout already is at the desired sha version.

Merge branch 'pacman_local_plus_check' of https://github.com/mivok/ansible into mivok-pacman_support_check_mode

Merge branch 'pacman_support_check_mode' of https://github.com/mivok/ansible into mivok-pacman_support_check_mode

Merge branch 'pulls/fix-hostvars-inconsistancy' of https://github.com/ferringb/ansible into ferringb-pulls/fix-hostvars-inconsistancy

Merge branch 'feature/zabbix-inventory' of https://github.com/resmo/ansible into resmo-feature/zabbix-inventory

make sure ssh do not ask password

Fixing typo in EC2 modules

The issue was that, when forks == 1, the _executor() function was
being called with None for the value of new_stdin.

Fixes #3841, #3902

Minor cleanup of CHANGELOG for 1.3

Fixes #2897

Also removing the ControlPath option, as it will now be auto-generated
if the ControlPersist option is set in the arguments.

Addresses CVE-2013-4260: predictable filename used for failed results
in world writable directory.

Files were being created in /tmp, but will now be created in $HOME/.ansible/cp/
Addresses CVE-2013-4259: ansible uses a socket with predictable filename in /tmp

relative pathing comes in handy on occasion, particularly when
delegating to localhost and running some command out of your playbook
repo. Making use of os.path.abspath will allow for the full path to
chdir and executable to be discovered if not provided.

The 'always_run' task clause allows one to execute a task even in
check mode.

While here implement Runner.noop_on_check() to check if a runner
really should execute its task, with respect to check mode option
and 'always_run' clause.

Also add the optional 'jinja2' argument to check_conditional() :
it allows to give this function a jinja2 expression without exposing
the 'jinja2_compare' implementation mechanism.

For some reason, ssh seems to ask for password even when
PasswordAuthentication is set to no, adding PreferredAuthentications
with the 2 options removed do the trick.

fixes ansible/ansible#3609 Add max_fail_pct to playbook parameter, to complement serial option, So if total number of failures execeed max_fail_pct * total number of hosts, do not go to the next serial batch

docsite typos

This extends ansible-pull so that it can support using other
source_control modules for checking out a playbook repository
(issue #3372).  This will check to see if the module exists before
it attempts to do the checkout and will exit if the module is not found.
It requires that the module used to check out the repository support the
parameters 'name' and 'version'.  The option -C, --checkout is now
optional and defaults to the module's default behavior for selecting a
branch, tag, or commit value.  For git, this continues to be HEAD.

Other changes include:
* Remove git from help and use generic term(s) where needed.
* Use SortedOptParser from ansible.utils
* More abstraction of common options used between ansible and
  ansible-playbook.