AS7-6293 Upgrade mod_cluster to 1.2.3.Final
Align versions with 7.1
[AS7-6128m] Adjust model representation of COLUMN_NAME and COLUMN_TYPE to support expressions.
[AS7-6128m] Centralise transformer code.
[AS7-6128m] Add reject expressions transformer test case.
Make it possible to have fine-graind validation for complex attributes
[AS7-6128m] Validate string-keyed-table and binary-keyed-table, and make it fine-grained
[AS7-6128m] Tidy up test cases.