Upgraded the hawtbuf version to 2.7
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Key: CAMEL-4762
URL: https://issues.apache.org/jira/browse/CAMEL-4762
Project: Camel
Issue Type: Task
Reporter: Willem Jiang
Assignee: Willem Jiang
Priority: Minor
Fix For: 2.9.0
hawtbuf 2.7 has a fix which can help the ObjectCodec load the class dynamically.
We need to use it to fix the issue of CAMEL-4709.
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