getObject() and getExternalInfo() load externalInfo

[will-moore]

See ome/omero-web#613.

This tweaks the base BlitzObjectWrapper._getQueryString() to include loading externalInfo.

It also adds BlitzObjectWrapper.getExternalInfo() to return the externalInfo and load it if necessary, e.g. for cases where self._obj is NOT the object loaded by getObject().

E.g. for image:

def __loadedHotSwap__(self):
        ctx = self._conn.SERVICE_OPTS.copy()
        ctx.setOmeroGroup(self.getDetails().group.id.val)
        self._obj = self._conn.getContainerService().getImages(
            self.OMERO_CLASS, (self._oid,), None, ctx)[0]

To test:

Set some values for ExternalInfo:
Using this branch:

$ omero obj ext-info-set Image:12 myLsid myEntityType

Since the JSON API uses _getQueryString() to build queries, and omero-marshal already handles externalInfo, you can check the details at E.g. /api/v0/m/images/ID/: (NB: deployed on idr-testing, e.g. /api/v0/m/images/15159664/).

"externalInfo": {
    "@type": "TBD#ExternalInfo",
    "@id": 8,
    "omero:details": {},
    "EntityId": 3,
    "EntityType": "com.glencoesoftware.ngff:multiscales",
    "Lsid": "test_dataset_extinfo"
}

[will-moore]

@jburel I added support for:

$ omero obj ext-info-set Image:12 myLsid myEntityType

so we can set externalInfo on any object now.

[snoopycrimecop]

Conflicting PR. Removed from build OMERO-python-superbuild-push#350. See the console output for more details.
Possible conflicts:

• PR Add parents and children to omero obj #299 joshmoore 'Add parents and children to omero obj'
  • src/omero/plugins/obj.py

--conflicts

[snoopycrimecop]

Conflicting PR. Removed from build OMERO-python-superbuild-push#351. See the console output for more details.
Possible conflicts:

• PR Add parents and children to omero obj #299 joshmoore 'Add parents and children to omero obj'
  • src/omero/plugins/obj.py

--conflicts

[snoopycrimecop]

Conflicting PR. Removed from build OMERO-python-superbuild-push#352. See the console output for more details.
Possible conflicts:

• PR Add parents and children to omero obj #299 joshmoore 'Add parents and children to omero obj'
  • src/omero/plugins/obj.py

--conflicts

[snoopycrimecop]

Conflicting PR. Removed from build OMERO-python-superbuild-push#353. See the console output for more details.
Possible conflicts:

• PR Add parents and children to omero obj #299 joshmoore 'Add parents and children to omero obj'
  • src/omero/plugins/obj.py

--conflicts

[snoopycrimecop]

Conflicting PR. Removed from build OMERO-python-superbuild-push#354. See the console output for more details.
Possible conflicts:

• PR Add parents and children to omero obj #299 joshmoore 'Add parents and children to omero obj'
  • src/omero/plugins/obj.py

--conflicts

[snoopycrimecop]

Conflicting PR. Removed from build OMERO-python-superbuild-push#355. See the console output for more details.
Possible conflicts:

• PR Add parents and children to omero obj #299 joshmoore 'Add parents and children to omero obj'
  • src/omero/plugins/obj.py

--conflicts

[snoopycrimecop]

Conflicting PR. Removed from build OMERO-python-superbuild-push#356. See the console output for more details.
Possible conflicts:

• PR Add parents and children to omero obj #299 joshmoore 'Add parents and children to omero obj'
  • src/omero/plugins/obj.py

--conflicts

[snoopycrimecop]

Conflicting PR. Removed from build OMERO-python-superbuild-push#357. See the console output for more details.
Possible conflicts:

• PR Add parents and children to omero obj #299 joshmoore 'Add parents and children to omero obj'
  • src/omero/plugins/obj.py

--conflicts