Rename bean-validation-add-constraint

In FORGE-1394 there is a proposition of renaming bean-validation commands into constraint. It might be clear (e.g. NotEmpty is not part of Bean Validation but a proprietary Hibernate Validator) and shorter commands. So instead of :

bean-validation-setup
bean-validation-add-constraint --property room --constraint NotNull

We should have

constraint-setup
constraint-add --property room --constraint NotNull

And to reflect FORGE-1446 and FORGE-944 we should have

constraint-add --named NotNull --onProperty room