on schedule experiment com.fasterxml.jackson.databind.JsonMappingException: failed to lazily initialize a collection o

fix for exceptions on schedule experiment com.fasterxml.jackson.databind.JsonMappingException: failed to lazily initialize a collection of role: org.etsi.osl.model.nfv.Product.categories: could not initialize proxy - no Session (through reference chain: org.etsi.osl.model.nfv.DeploymentDescriptor["experiment"]->org.etsi.osl.model.nfv.ExperimentMetadata$1SnipExperimentMetadata["constituentVxF"]->org.hibernate.collection.spi.PersistentBag[0]->org.etsi.osl.model.nfv.ConstituentVxF["vxfref"]->org.etsi.osl.model.nfv.VxFMetadata["categories"])