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Ship a separate cockpit-docker subpackage on RHEL.

On Fedora we ship Cockpit docker support in a separate subpackage, so that it can be optionally installed if desired. Up until now, on RHEL we've been folding it into the cockpit-shell subpackage instead. 

Going forward, due to the needs of RHEV-H, we need to split out cockpit-docker on RHEL. This means including it as a line item in RHEL Atomic Tree as well.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-0227.html

Yes, we still see it:

[root@dhcp-10-16 ~]# rpm -q --whatrequires docker
cockpit-docker-0.114-2.el7.x86_64
[root@dhcp-10-16 ~]# rpm -q --whatrequires cockpit-docker
cockpit-0.114-2.el7.x86_64