Add RefDataFormat to make configuring data format consistent
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Key: CAMEL-3963
URL: https://issues.apache.org/jira/browse/CAMEL-3963
Project: Camel
Issue Type: Improvement
Components: camel-core
Reporter: Claus Ibsen
Assignee: Claus Ibsen
Priority: Minor
Fix For: 2.8.0
By having a RefDataFormat we get that exposed in the XSD/model, and it makes it
more explicit that is a possible data format to use.
This makes it easier for 3rd party tooling who introspects the Camel model.
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