Configuration update doesn't store changes to the persistent storage.
See attached example.
To run example build it with:
Then put generated bundle "config-update-1.0.jar" to the deploy folder.
Expected: property "size" value was changed from "500" to "1000" in etc/org.apache.karaf.log.cfg
Actual: changes are not stored to file, but we can see them in Karaf with "config:list".