bugfix: necessary for attaching the "foregin" objects to their hive_pipelines
bugfix: necessary for attaching the "foregin" objects to their hive_pipelines

This reverts commit 8a9f0b16178723b56b2fa9473bcff4ab6c32ca37.

Ensembl/ensembl-hive,Ensembl/ensembl-hive,Ensembl/ensembl-hive,Ensembl/ensembl-hive