[LMS-2366] methods for finding trashed entities in DAO + basic tests

...msx/cisd/openbis/generic/server/business/bo/ITrashBO.java

...emsx/cisd/openbis/generic/server/business/bo/TrashBO.java

...s/generic/server/dataaccess/IAuthorizationDAOFactory.java

.../cisd/openbis/generic/server/dataaccess/IDeletionDAO.java

...isd/openbis/generic/server/dataaccess/db/AbstractDAO.java

...generic/server/dataaccess/db/AuthorizationDAOFactory.java

...sx/cisd/openbis/generic/server/dataaccess/db/DataDAO.java

...isd/openbis/generic/server/dataaccess/db/DeletionDAO.java

...openbis/generic/server/dataaccess/db/ExternalDataDAO.java

.../cisd/openbis/generic/server/dataaccess/db/SampleDAO.java

...isd/openbis/generic/shared/dto/properties/EntityKind.java

...openbis/generic/server/dataaccess/db/DeletionDAOTest.java