BIS-228 / SP-368: Bugfixes & rest of tests.

...enbis/dss/generic/shared/HierarchicalContentProvider.java

...dss/generic/shared/content/RemoteHierarchicalContent.java

...generic/shared/content/RemoteHierarchicalContentNode.java

...generic/shared/content/RemoteHierarchicalContentTest.java

...ava/ch/systemsx/cisd/openbis/uitest/dsl/SeleniumTest.java

...stemsx/cisd/openbis/uitest/rmi/ReportFromDataSetsRmi.java

...suite/headless/DataSetsContainMetaProjectInformation.java

...te/headless/ExperimentsContainMetaProjectInformation.java

...uite/headless/MaterialsContainMetaProjectInformation.java

...sd/openbis/uitest/suite/headless/MetaProjectCreation.java

...cisd/openbis/uitest/suite/headless/MultiDssReporting.java

.../suite/headless/SamplesContainMetaProjectInformation.java

...sd/openbis/uitest/suite/metaproject/MetaProjectSuite.java

ui-test/source/java/tests.xml

ui-test/source/java/tests_headless.xml