Add logging statements to Cellar where it makes sense.
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Key: KARAF-721
URL: https://issues.apache.org/jira/browse/KARAF-721
Project: Karaf
Issue Type: Improvement
Reporter: Michael Van Geertruy
This came from an end-user. They'd like to see logs messages at the INFO level
for the following:
1) When a configuration or provisioning modification is made in a node,
2) When a node has a configuration or provisioning change sent to it,
3) When a node originates a configuration or provisioning change,
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