Concept search by ID displays double results

On the demo site (http://uat01.openmrs.org:8080/openmrs/), when searching concept by ID, it displays double results because it's finding the same concept two different ways - once with internal ID and the other with its mapping code.

Steps to reproduce:

• Go to concept search on http://uat01.openmrs.org:8080/openmrs/
• Type in concept id (116128)
• Two "malaria" are displayed on the search result. See Screen Shot 2016-03-31 at 4.10.44 PM.png.

https://talk.openmrs.org/t/concept-issue-in-platform-1-11-5/5569