DSN does not show up on InterSystems Ensemble SQL Gateway configuration.

I am running InterSystems Ensemble 2016.2 on ubuntu and trying to connect to a remote MS SQL server database.

Insofar, I have successfully configured my ubuntu machine to connect to the remote MS SQL server database using unix-odbc. That is:

• Telnet connection works
• tsql (test sql) connection works
• isql command succesfully connects to sql server and I am able to execute queries on ubuntu.
• The DSN for the isql command are defined in /etc/odbc.ini and /etc/odbcinst.ini and should be available systemwide.
• The DSN in the odbcinst.ini uses the microsoft odbc driver 13 for Sql Server for linux. 

However, when I access the sql gateway in the management portal the DSN configured in /etc/odbc.ini does not show up. Does anyone know how I can expose my DSN defined in /etc/obdc.ini to Ensemble? I already tried creating a shortcut in /intersystems/mgr directory named cacheodbc.ini (as described here: https://groups.google.com/forum/#!topic/intersystems-public-cache/4__Xch...), but insofar no success :(.