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Red Hat Mobile Application Platform (RHMAP) distributes its contents as Container Images through the Red Hat Docker Registry. The RHMAP container images are bound by entitlements and the docker registry provides access to images based on valid entitlements.

subscription-manager-plugin-container is used for managing the entitlement certificates for these RHMAP container images and is a required package for getting the platform installed. 

However it is currently offered only through the " rhel-7-server-optional-rpms " channel which is unsupported. "Software packages in the Optional and Supplementary channels are not supported, nor are the ABIs guaranteed."
https://access.redhat.com/support/offerings/production/scope_moredetail/

Kindly offer the subscription-manager-plugin-container in a supported channel for RHEL.

After discussion with John providing the qa_ack+.

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/RHEA-2016-2143.html