Upgrade smack version to 2.3.1
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Key: CAMEL-4836
URL: https://issues.apache.org/jira/browse/CAMEL-4836
Project: Camel
Issue Type: Task
Components: camel-xmpp
Reporter: Willem Jiang
Assignee: Willem Jiang
Priority: Minor
Fix For: 2.9.1
As the smack 2.3.1 maven artifacts are in the maven central, we need to think
about upgrading the version to get ride of the dependency of other maven repo.
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