No original metadata

[pwalczysko]

The reader does not seem to read Original Metadata to serve webclient metadata display. See workflow below

Workflow

1. Select image (ome.zarr) https://merge-ci.openmicroscopy.org/web/webclient/?show=image-231235 (user-8)
2. On the RHP of webclient, go to Acquisition tab. Expand the Original Metadata harmonica.
3. Observe that the harmonica is empty
4. Select the image from which the ome.zarr in Ad 1. above was created. This is https://merge-ci.openmicroscopy.org/web/webclient/?show=image-231251 (user-8)
5. Observe that the harmonica is populated

cc @dgault , reported on https://docs.google.com/spreadsheets/d/1tMynbIEnCy3Rgkpm5guQWRYT67oAc1e9EqoCPkKR6hE/edit#gid=0 in line 6

[dgault]

Issue should be resolved with the latest commits on the #31