SSDM-4723: Fix inconsistencies in schema

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

...stemsx/cisd/openbis/generic/shared/dto/ContentCopyPE.java

...ystemsx/cisd/openbis/generic/shared/dto/LocationType.java

openbis/source/sql/generic/159/schema-159.sql

openbis/source/sql/postgresql/159/domains-159.sql

openbis/source/sql/postgresql/159/function-159.sql

...bis/source/sql/postgresql/migration/migration-158-159.sql

openbis/sourceTest/sql/postgresql/159/005=content_copies.tsv

...urceTest/sql/postgresql/159/020=database_version_logs.tsv

openbis/sourceTest/sql/postgresql/159/045=persons.tsv

...is/sourceTest/sql/postgresql/159/052=role_assignments.tsv

openbis/sourceTest/sql/postgresql/159/schema-159.sql