Hibernate validator messages handling

[vankeisb]

The handling of the validator messages is not good. We have to bridge between Stripes and Validator (in HibernateValidateFacet), which causes parameter replacement issues.

Validator has its own message interpolation system, which doesn't work with indexed params but with named placeholders. Moreover it doesn't display the field name by default.

In <= 2.0.3 we try to translate the messages using a correspondency map for message templates. We locate the template in the Stripes resources (don't even care about the Validator messages) and try to pass the replacement params.
We have inconsistent behavior depending on the platform : the parameters are not passed in the same order to the message template. We actually pass map keys, an unordered set, so it's a real bug in our code.

We need to find a better system, by using the Validator messages instead of our owns.

[vankeisb]

d0e6b21 fixed a few things :

• no more Stripes<->Validator message keys
• custom errors get added directly using the Validator messages

There is still a quirk : we do hard-coded concat of the field name and the message. I found no direct way to make Validator use the field name.