[LMS-1452], [LMS-1453] db migration, PE and DTO changes

...neric/server/business/bo/datasetlister/DatasetLister.java

...neric/server/business/bo/datasetlister/DatasetRecord.java

...s/generic/server/dataaccess/db/DatabaseVersionHolder.java

.../generic/shared/basic/dto/DataSetArchivizationStatus.java

...x/cisd/openbis/generic/shared/basic/dto/ExternalData.java

...systemsx/cisd/openbis/generic/shared/dto/ColumnNames.java

...temsx/cisd/openbis/generic/shared/dto/ExternalDataPE.java

...x/cisd/openbis/generic/shared/dto/ValidationMessages.java

...bis/generic/shared/translator/ExternalDataTranslator.java

openbis/source/sql/generic/050/data-050.sql

openbis/source/sql/generic/050/schema-050.sql

openbis/source/sql/postgresql/050/domains-050.sql

openbis/source/sql/postgresql/050/function-050.sql

openbis/source/sql/postgresql/050/grants-050.sql

...bis/source/sql/postgresql/migration/migration-049-050.sql

...bis/generic/server/dataaccess/db/ExternalDataDAOTest.java

openbis/sourceTest/sql/postgresql/050/.DUMP

...sourceTest/sql/postgresql/050/001=attachment_contents.tsv

openbis/sourceTest/sql/postgresql/050/002=attachments.tsv

...ceTest/sql/postgresql/050/005=controlled_vocabularies.tsv