Allow theforeman/foreman 29.x

[evgeni]

No description provided.

[evgeni]

The failure is:

       the missing elements were:      [":db_connection_string: postgres://foreman-proxy:changeme@test.example.com:5432/container_gateway"]
       the extra elements were:        [":db_connection_string: postgres://test.example.com:5432/container_gateway"]

😕

[evgeni]

Fix in #894