Comment 5 for bug 1551937

so, verified xenial installs with sipmly this diff:

=== modified file 'curtin/commands/curthooks.py'
--- curtin/commands/curthooks.py 2016-02-22 21:10:40 +0000
+++ curtin/commands/curthooks.py 2016-03-02 01:32:21 +0000
@@ -562,7 +562,7 @@
     if mpbindings or not os.path.isfile(multipath_bind_path):
         # we do assume that get_devices_for_mp()[0] is /
         target_dev = block.get_devices_for_mp(target)[0]
- wwid = block.get_scsi_wwid(target_dev)
+ wwid = block.get_scsi_wwid(target_dev, replace_whitespace=True)
         blockdev, partno = block.get_blockdev_for_partition(target_dev)

         mpname = "mpath0"

I'll try trusty now.