SSDM-2718: temporary rollback changes from rev 35363 because they break multiple system tests:

- openbis-oai-pmh - ch.ethz.sis.openbis.oai_pmh.systemtests.PublishServletTest
- screening - ch.systemsx.cisd.openbis.screening.systemtests.AggregatedFeatureVectorsTest.dropAnExampleDataSet
- js-tests - getExperimentImageMetadata()
After the rollback the new tests: ExecuteServiceTest and SearchServiceTest would not work, therefore they got disabled. Once we fix the core plugins problem they should be enabled again.

SVN: 35391