SSDM-3239: replace JARs in lib/ by recent once. Update all plugin files. Change version from 13.06.1 to 13.06.2

SVN: 35847

replace dss_client.jar and openbis-query-api.jar in libraries/openbis-apis and openbis_knime/lib by version 13.04.2

SVN: 29508

- show meaningful error messages when reports have different number of columns or columns have different types
- create common multiplexer unit tests
- show reports only once in the reports list even if they are provided by multiple data stores
- show information which data store aggregation service comes from when there is more than one data store

SVN: 29260

SVN: 28882