ISIS-421: Remaining Get_whenQueryArg_xRoDomainModel_ok RO TCK Tests

Signed-off-by: Dan Haywood <danhaywood@apache.org>
ISIS-444: @MinLength for autocomplete methods, and no min length for choices.

* also tiny performance improvement in ServicesInjectorDefault (no jira ticket raised).
ISIS-445: actions can return Blob or Clob

- will be downloaded
- the veil is suppressed (otherwise is never cleared)
ISIS-446, ISIS-441: enhancements to ToDoItem class

- adding DeveloperUtilities to example
- using ObjectContracts in ToDoItem
  - fixed issue whereby couldn't use isXxx() methods; now can.
ISIS-446: some small refinements

to exclude certain specs.