initial draft acl module

Signed-off-by: Brian Coca <briancoca+dev@gmail.com>
corrected absent example
Signed-off-by: Brian Coca <briancoca+dev@gmail.com>
fixed error on detecting missing requirements
Signed-off-by: Brian Coca <briancoca+dev@gmail.com>
added nwe module "ovirt"
Added an env-setup file for Fish
Fixed incorrectly set PYTHONPATH
add a way for callback to disable itself

The idea is that some plugin would not be called in some
specific case, and the callback should decide by itself.

Having a way to globally disable it is much cleaner than
disabling every method one by one on the plugin side.

My use case is for fedora-infrastructure that cannot be run
from git checkout since it try to connect to the message bus,
but another case would be to bootstrap infrastructure, or to
run the code on a test servers without having all the callback
infrastructure setup.
Fixed usage comment to fish syntax for sourcing a file
add test for the disabling of callback plugins
- fixed typos and errors from feedback
- now makes sure a proper mask is added
- now captures I/O error produced when group, user or permissions are
  invalid
Signed-off-by: Brian Coca <briancoca+dev@gmail.com>
supports nested values of ohai.
Add option remote_user to task level, to specify the ssh login user
Improves lineinfile's error checking

Line in file would raise a TypeError exception if
the 'line' key was in params, but its value was None.
Makes pervious lineinfile fix more explicit
Introduce open-iscsi module to manage targets on the initiator.
Add crypt scheme to htpasswd params
Add option to specify the MySQL server port
Added collection of user's env
Signed-off-by: Brian Coca <briancoca+dev@gmail.com>
Add support to Boto library < 2.5.0
now w/o python module dependencies

Signed-off-by: Brian Coca <briancoca+dev@gmail.com>