Provide TraversableResolver for use with Bean Validation Factory
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                 Key: OPENJPA-1107
                 URL: https://issues.apache.org/jira/browse/OPENJPA-1107
             Project: OpenJPA
          Issue Type: Sub-task
          Components: validation
    Affects Versions: 2.0.0
            Reporter: Jeremy Bauer
            Assignee: Jeremy Bauer


Per the JPA 2.0 specification, a TraversableResolver must be provided in order 
to meet the validation criteria outlined in section 3.6.1.2 of the 3/13/09 
draft.

The validator instance that is used for automatic validation upon lifecycle 
events must use a TraversableResolver
that has the following behavior:
• Attributes that have not been loaded must not be loaded.
• Entity associations (single-valued or multi-valued) must not be traversed.

These requirements guarantee that no unloaded attribute or association will be 
loaded by side effect and
that no entity will be validated more than once.
Embeddable attributes must be validated only if the Valid annotation has been 
specified on them.
It is the responsibility of the persistence provider to pass an instance 
implementing the javax.validation.
TraversableResolver interface to the Bean Validation provider by calling 
ValidatorFactory.
usingContext().traversableResolver(

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