LMS-1622 providing data source by DSS code instead of data set code

...gin/screening/server/IScreeningBusinessObjectFactory.java

...ugin/screening/server/ScreeningBusinessObjectFactory.java

...gin/screening/server/dataaccess/IScreeningDAOFactory.java

...n/screening/server/dataaccess/db/ScreeningDAOFactory.java

...ugin/screening/server/logic/GenePlateLocationsLoader.java

...bis/plugin/screening/server/logic/PlateContentLoader.java