Fix command for retrieving filters.

Python raised this before:
> AttributeError: 'LightPathI' object has no attribute 'copyEmissionFilters'
Print Dichroic information.

Previously, the dichroic object was retrieved and ignored. ;)
Check if there was an actual Dichroic object returned.
Fix the dichroic type check.
Fix wrong indenting.
No fileAnnID in Metadata.py

BlitzGateway.loadOriginalMetadata always returns a None for
the first element of `om` for all data newly imported in OME5
since no extra file is created.
Merge pull request #2145 from snoopycrimecop/merge/develop/submodules

Regularly scheduled submodules bump
Merge pull request #1 from joshmoore/niko-fix

No fileAnnID in Metadata.py
Merge pull request #2146 from imcf/develop

Bug fix and improvement for the Metadata.py example.
Update develop submodules

Repository: openmicroscopy/openmicroscopy
Already up-to-date.

Repository: openmicroscopy/bioformats
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Repository: ome/scripts
Already up-to-date.

Repository: openmicroscopy/ome-documentation
Updating 3689d53..e34f616
Merged PRs (fast-forward):
  # PR 690 bpindelski 'Update OMERO.grid doc (rebased onto develop)'

Generated by OMERO-5.1-latest-submods#47 (http://ci.openmicroscopy.org/job/OMERO-5.1-latest-submods/47/)