merge changes from ITXT-4
add missing files from ITXT-4
Simplify the bus_index code

Instead of comparing the paths components by components just compare the
complete strings. The behavior of this change should be backwards compatible
with the old code.
Merge final changes
some code-level documentation
Add oneshot? method to service objects

This allows barclamp to specify that there should not be a second
chef-client run in case of failures. This is needed for one-shot
barclamps, where a second chef-client run won't do anything anymore and
therefore will always result with a success.

See discussion at
http://lists.us.dell.com/pipermail/crowbar/2013-June/003302.html
Merge pull request #8 from crowbar/release/pebbles/master

pull changes from dell
Merge pull request #9 from MirantisDellCrowbar/release/pebbles/master

pull changes from dell
refactoring feature of validating chef attributes
tiny fix
raise error when node not ready -> rescue to sleep(1)
typo
Use /etc/sysctl.d on all platforms

The crowbar-hacks cookbook was updated to create a workaround (via cron) on
system that do not support /etc/sysctl.d/ by default.
The old code was in conflict with code from the network barclamp which
unconditionally created /etc/sysctl.d anyway.
Move navigation data to crowbar.yml, second try
add missing ';'
typo
add empty lines
Allow using the serial number for defining the bus order

This syncs in the latests changes from the get_bus_order function in the
"barclamp" cookbook of the "deployer" barclamp.
Fix NodeObject.save to properly remove elements from node

When an element got removed from the role, we also need to remove the
element from the node when saving it.

Chef::Mixin::DeepMerge::deep_merge is not removing any element, it's
just adding/replacing. So we need to have an old copy of the role
attributes after the last save, to be able to identify the removed
elements, and remove them from the node elements.

Note that there's a knockout_prefix option in
Chef::Mixin::DeepMerge::deep_merge that we could use, but it doesn't
really remove the element (it gives it an empty value) and it's gone in
chef 11.
Remove mention of redhat_install and ubuntu_install barclamps

They're not used since quite some time.