mock object

Add support for more fields.
check that the Java integration tests are still green.

Related to https://github.com/openmicroscopy/bioformats/pull/1471
This test seems to be revealing a problem: https://ci.openmicroscopy.org/view/Failing/job/OMERO-5.1-merge-integration-java/lastCompletedBuild/testngreports/integration/integration.ImporterTest/testImportImageWithAcquisitionData/