LMS-2846 tests for AnalysisSettings and ExperimentFeatureVectorSummaryLoader added.

...cisd/openbis/plugin/screening/server/ScreeningServer.java

.../plugin/screening/server/logic/AbstractContentLoader.java

...enbis/plugin/screening/server/logic/AnalysisSettings.java

...ng/server/logic/ExperimentFeatureVectorSummaryLoader.java

...ning/server/logic/MaterialFeatureVectorSummaryLoader.java

...erver/logic/MaterialFeaturesFromAllExperimentsLoader.java

...nbis/plugin/screening/server/logic/WellContentLoader.java

...openbis/plugin/screening/server/logic/WellDataLoader.java

...n/screening/server/logic/WellFeatureCollectionLoader.java

...s/plugin/screening/server/logic/AnalysisSettingsTest.java

...erver/logic/ExperimentFeatureVectorSummaryLoaderTest.java

.../server/logic/MaterialFeatureVectorSummaryLoaderTest.java