[Bug 1098120] Unable to buid images that interact with /etc/groups

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1098120

--- Comment #3 from oarribas  ---
In a container created with docker 0.9.1 and running with docker 0.11, if I try
to do a "su - postgres" it fails:

bash-4.2# su - postgres
su: System error

It runs in the same container, when running with docker 0.9.1