Remove unneeded Jackson dependency from node-repository
Remove unneeded Jackson dependency from node-repository

- Dependency was transitively including jackson-databind with compile scope

vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa