Description of problem:

Upgrade from 6.14 to 6.15  on Satellite with Pull-MQTT enabled fails with Could not find template 'mosquitto/mosquitto.conf'

How reproducible:

• Only in customer environment. 

Actual behavior:

satellite-installer section of the upgrade fails with the following message:

[ERROR ] [configure] Evaluation Error: Error while evaluating a Function Call, Could not find template 'mosquitto/mosquitto.conf' (file: /usr/share/foreman-installer/modules/mosquitto/manifests/config.pp, line: 26, column: 16) on node satellite.example.com

Expected behavior:

Upgrade should complete without any errors.