Add Immediate Validation to Node Type Management Classes

JCR2 requires the various template classes related to node type management to perform immediate validation on the name fields. This validation is supposed to throw a ConstraintViolationException if it fails. Affected classes and mutators include:

• JcrNodeTypeTemplate.setName
• JcrNodeDefinitionTemplate.setName, .setRequiredPrimaryTypeNames, and .setDefaultPrimaryTypeName
• JcrPropertyDefinitionTemplate.setName