MB-10086: implemented clusterwide logs collection service

Change-Id: Id2a46565a6da898031d8dcc063647e9ad8841a16
Reviewed-on: http://review.couchbase.org/37822
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Artem Stemkovski <artem@couchbase.com>