hql.py: when querying masks, filter bytes field

[joshmoore]

omero hql "select s from Shape s" or similar fails with

UnicodeEncodeError: 'utf-8' codec can't encode character '\udcb0' in position 3797: surrogates not allowed

due to the bytes field.

[joshmoore]

This is the only field with that name:

(cd /opt/omero-build/omero-model/src/main/resources/mappings/; git grep bytes)
roi.ome.xml:            <optional name="bytes" type="byte[]"/>

[manics]

LGTM!

$ omero hql 'FROM Mask ' --limit 2

Error printing text
Traceback (most recent call last):
...
UnicodeEncodeError: 'utf-8' codec can't encode character '\udcf8' in position 779: surrogates not allowed

During handling of the above exception, another exception occurred:

vs

$ omero hql 'FROM Mask ' --limit 2

 # | Class | Id      | details         | theZ | roi          | fillColor   | x    | y     | width | height
---+-------+---------+-----------------+------+--------------+-------------+------+-------+-------+--------
 0 | MaskI | 1664225 | owner=2;group=3 | 3    | RoiI:1380865 | -2139062144 | 31.0 | 852.0 | 37.0  | 37.0
 1 | MaskI | 1664226 | owner=2;group=3 | 4    | RoiI:1380865 | -2139062144 | 28.0 | 849.0 | 42.0  | 42.0
(2 rows)