Add a sleep to cobbler start.

The previous cobbler code was only working by accident.

The cobbler service takes a little bit of time to be
able to service requests after being restarted/started.
Previously, things only appeared to work b/c a package
happened to install in between the management of the
cobbler service and the invocation of calls that actually use it.

I ran into issues when I added additional resources
to the catalog (when I updated to use the new puppet
module)

With these additional resources, another cobbler sync
was being called immediately after the service was started.
This resulted in the error:

Exec[cobbler-sync]/returns: cobblerd does not appear to be running/accessible

The underlying problem can be simply recreated with:

  /sbin/restart cobbler;cobbler syhc

This patch adds an additional sleep of 1 second to the start command.

I have verified that 1 second is consistently enough time for the
service to be able to accept request when the resource finishes
evaluating.
Merge pull request #41 from bodepd/add_service_sleep

Add a sleep to cobbler start.
Prefix template variable with @

Starting in Puppet 3.2. All variables in a compiled
erb template that access puppet variables from the scope
where the template was compiled should be prefixed with
@ to make them instance variables as opposed to local
variable/methods.

Failure to do so results in annoying and ugly deprecation
warnings.

The change was made b/c the ruby syntax for methods is the
same as local variables, and often lead to issues when a variable
name conflicted with built-in methods.

Referring to variables as instance variables in compatibile with
Puppet 2.7.x.
Merge pull request #42 from bodepd/add_at_sign_erb

Prefix template variable with @
Merge remote-tracking branch 'upstream/grizzly' into grizzly
Update preseed to use disk for /var and larger /

Remove the "hack" logical volume and make /var grow to
consume any free disk space.  /root is also made larger by
default.

These are still tweakable via:

$root_part_size
$var_part_size

in cobbler::ubuntu::preseed