You still have invalid syntax. "mapping" is supposed to be a closure, but you are defining it sort of like a map (See http://grails.org/doc/latest/guide/single.html#ormdsl)
Please attach a complete zipped app containing this example that shows this working correctly. I have a hard time believing it would work correctly anywhere, let alone Jenkins. The jenkins grails plugin isn't going to alter the runtime GORM mapping behavior of grails. The only way it could do so is if you supplied an external config as part of the build step, which is a standard Grails convention anyways and again nothing specific to Jenkins.
For starters, you are using invalid syntax for your hasMany map in DomainOne. I'd fix that first and then probably close this bug.