Added redis config module (slave and flush)
new module that handles extended attributes on files
Signed-off-by: Brian Coca <briancoca+dev@gmail.com>
Changed action keyword to command
Adding support for role dependencies.

Fixes #3686

Dependencies are enabled by adding a new directory/file named
meta/main.yml to the role. The format of the dependencies are:

dependencies:
- { role: foo, x: 1, y: 2 }
- { role: bar, x: 3, y: 4 }
...

Dependencies inherit variables as they are seen at the time of the
dependency inclusion. For example, if foo(x=1, y=2) has a dependency
on bar(x=3,z=4), then bar will have variables (x=3,y=2,z=4).

Different roles can have dependencies on the same role, and this
variable inheritence allows for the reuse of generic roles quite easily.
For example:

Role 'car' has the following dependencies:
dependencies:
  - { role: wheel, n: 1 }
  - { role: wheel, n: 2 }
  - { role: wheel, n: 3 }
  - { role: wheel, n: 4 }

Role 'wheel' has the following dependencies:
dependencies:
- { role: tire }
- { role: brake }

The role 'car' is then used as follows:
- { role: car, type: honda }

And tasks/main.yml in each role simply contains the following:
- name: {{ type }} whatever {{ n }}
  command: echo ''

TASK: [honda tire 1]
TASK: [honda brake 1]
TASK: [honda wheel 1]
TASK: [honda tire 2]
TASK: [honda brake 2]
TASK: [honda wheel 2]
TASK: [honda tire 3]
TASK: [honda brake 3]
TASK: [honda wheel 3]
TASK: [honda tire 4]
TASK: [honda brake 4]
TASK: [honda wheel 4]
TASK: [I'm a honda]  <- (this is in roles/car/tasks/main.yml)
Small cleanup, no need to call _get_role_path a second time
Adding evaluation of role vars as the dep tree is built

This allows variables to be inserted into the role scope specifically
while also being inserted into the global scope.
Adding documentation on role dependencies and variable scope/inheritance
Some install guide tweaks.
Merge branch 'role_dependencies' of git://github.com/jimi1283/ansible into jimi1283-role_dependencies
Moving some role deps stuff around a small amount.
Updated changelog
Fixing a small bug with the new role dependency feature

The block that added the original list of roles was indented too far,
and was only being reached if a role had dependencies. This resulted
in roles without dependencies from being added to the list of roles.

Credit goes to looped for reporting and diagnosing the issue.
image_id is not required to delete a vm from openstack

Since deletion do not check the type of image or anything,
and since that's tedious to keep track of the image_id and
just adding noise to add image_id for nothing, this commit
just relax the requirement.
setting 0644 permissions on mkstemp file handles. Fixes issue #3857
Merge pull request #3878 from sjahl/apt_repository-perms-fix

setting 0644 permissions on mkstemp file handles. Fixes issue #3857
Add module to control EC2 security groups
Minor fix, vpc_id is not required for the ec2_group
Fixed tiny bug with _meta handling in external inventory scripts
Merge branch 'redis-config' of https://github.com/slok/ansible into slok-redis-config
Fixing small typo in redis module documentation