SSDM-4646: delete also now unneeded test database version

openbis/sourceTest/sql/postgresql/157/.DUMP

...sourceTest/sql/postgresql/157/001=attachment_contents.tsv

openbis/sourceTest/sql/postgresql/157/002=attachments.tsv

...st/sql/postgresql/157/003=authorization_group_persons.tsv

...ourceTest/sql/postgresql/157/004=authorization_groups.tsv

...ceTest/sql/postgresql/157/005=controlled_vocabularies.tsv

...st/sql/postgresql/157/006=controlled_vocabulary_terms.tsv

openbis/sourceTest/sql/postgresql/157/008=data_all.tsv

...sourceTest/sql/postgresql/157/009=data_set_properties.tsv

...est/sql/postgresql/157/011=data_set_relationships_all.tsv

...sql/postgresql/157/012=data_set_relationships_history.tsv

...t/sql/postgresql/157/013=data_set_type_property_types.tsv

openbis/sourceTest/sql/postgresql/157/014=data_set_types.tsv

openbis/sourceTest/sql/postgresql/157/017=data_stores.tsv

openbis/sourceTest/sql/postgresql/157/018=data_types.tsv

...urceTest/sql/postgresql/157/019=database_version_logs.tsv

openbis/sourceTest/sql/postgresql/157/020=deletions.tsv

...urceTest/sql/postgresql/157/023=experiment_properties.tsv

...sql/postgresql/157/026=experiment_type_property_types.tsv

...is/sourceTest/sql/postgresql/157/027=experiment_types.tsv