bug in RHEL's latest libblkid and facter

[Fabrice Bacchella]

A bug (?) in the latest libblkid for RHEL 7 broke facter partitions

For example, on two servers, with different version of this package:

Before (libblkid-2.23.2-22.el7_1.x86_64.):
~# facter partitions
{
/dev/sda2 => {
filesystem => "xfs",
label => "/",
mount => "/",
partuuid => "XXX",
size => "16.00 GiB",
size_bytes => 17180917760,
uuid => "XXX"
},
...
}

After (libblkid-2.23.2-22.el7_1.1.x86_64):
~# facter partitions
{
/dev/block/8:2 => {
filesystem => "xfs",
label => "/",
partuuid => "XXX",
size => "0 bytes",
size_bytes => 0,
uuid => "XXX"
},

mount is gone, size become 0.

/dev/block/8:2 is present on both servers and is indeed a symbolic link to /dev/sda2