Expose logs base path
This commit responds to a change in core Elasticsearch to expose
different properties for configuring the log files.
Relates elastic/elasticsearch#4633
Original commit: elastic/x-pack-elasticsearch@4caab617bf3dc7456a744be86c07fad392515d0d
appender.audit_rolling.type = RollingFile
appender.audit_rolling.name = audit_rolling
-appender.audit_rolling.fileName = ${sys:es.logs}_access.log
+appender.audit_rolling.fileName = ${sys:es.logs.base_path}${sys:file.separator}${sys:es.logs.cluster_name}_access.log
appender.audit_rolling.layout.type = PatternLayout
appender.audit_rolling.layout.pattern = [%d{ISO8601}] %m%n
-appender.audit_rolling.filePattern = ${sys:es.logs}_access-%d{yyyy-MM-dd}.log
+appender.audit_rolling.filePattern = ${sys:es.logs.base_path}${sys:file.separator}${sys:es.logs.cluster_name}_access-%d{yyyy-MM-dd}.log
appender.audit_rolling.policies.type = Policies
appender.audit_rolling.policies.time.type = TimeBasedTriggeringPolicy
appender.audit_rolling.policies.time.interval = 1
