LU-107 Add scripts for implementing heartbeat v1 failover

LU-107 Add scripts for implementing heartbeat v1 failover

/usr/sbin/ldev - list devices, determine validity, etc.
/usr/sbin/lhbadm - wrapper for heartbeat utils for failover/failback/status
/etc/ha.d/resource.d/Lustre - heartbeat resource agent (wraps init script)
/etc/init.d/lustre - lustre init script
/etc/init.d/lnet - lnet init script
/usr/sbin/haconfig - helper script for building heartbeat config files

The scripts use two configuration files:
 /etc/ldev.conf - maps hostnames to failover partners, devices, and labels
 /etc/nids - hostnames to lustre NIDS

In addition to heartbeat support, the ldev script enables parallel
execution of commands against all luns configured on a server.  The
lustre init script supports devices backed by Linux software RAID, ZFS,
or traditional block devices.

NOTE: these scripts presume the udev rules for persistent block device
naming are in place, in particular that lustre labels can be mapped to
block devices in /dev/disk/by-id.

Change-Id: I8391744ce6eed989c061f131aca4a2da7b5d51b2
Signed-off-by: Ned Bass <bass6@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-on: http://review.whamcloud.com/290
Reviewed-by: Doug Oucharek <doug@whamcloud.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Tested-by: Hudson
Reviewed-by: Oleg Drokin <green@whamcloud.com>