Add new line to rebalance report output

For log forwarding, currently we have to pre-process the rebalance reports as they appear to add a new line to them. Could we update the implementation just to add a new line to the end of the report? 

https://github.com/couchbase/couchbase-fluent-bit#rebalance-reports-and-dynamic-configuration 

It would mean people can also use the default fluent bit OSS implementation then as well (e.g. for non-operator usage or if they're on a cloud that already uses fluent bit like AWS).