Migrating the external DWH from 4.3 to 4.4 fails when configuring Grafana
Issue
During the migration of the external DWH server from 4.3 to 4.4, the "engine-setup" commands fails with the following error when "Yes" is answered to the "Configure Grafana on this host" question:
[ ERROR ] Failed to execute stage 'Environment customization': 'NoneType' object has no attribute 'execute_on_engine'
Environment
Red Hat Virtualization 4.4
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