Make pacemaker barclamp setup the LVM for DRBD

We add a new option to allow the user to tell whether DRBD is going to
be used. If that's the case, then we create the LVM setup that the other
barclamps will then use.
Merge pull request #53 from vuntz/drbd

Make pacemaker barclamp setup the LVM for DRBD
outdated-wfc-timeout has to be shorter than degr-wfc-timeout
fix output format from drbd-overview command
include proper recipe resource in default.rb
run resource directory
add mount condition
disable DRBD's online usage counter
add :immediate to subscriptions
wait for drbd resource
remove unnecessary ruby_block
allow to create multi resources
change how default.rb is included
setup configure attribute for resource when it is ready
check always proper drbd resource
remove include default.rb from resource.rb
Add a comment explaining the configured attribute for resources
drbd: configure all resources that were not configured yet
drbd: Rename variables, and use the resource hash directly
drbd: Use node hostname instead of splitting the first item from name