[SSSD] [sssd PR#21] IFP: expose user and group unique IDs through DBus (opened)

[fidencio]

tequeter's pull request #21: "IFP: expose user and group unique IDs through DBus" was opened

PR body:
"""
This adds a uniqueID property on User and Group InfoPipe objects. It has a
useful value on AD- and IPA-backed domains. For Active Directory, this is the
GUID.
"""

See the full pull-request at https://github.com/SSSD/sssd/pull/21
... or pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/21/head:pr21
git checkout pr21