Elasticsearch 5: Format transport client logs
This commit adds some basic formatting to the transport client logs for
the transport client used in the Elasticsearch 5 binding.
appender.console.type = Console
appender.console.name = console
appender.console.layout.type = PatternLayout
+appender.console.layout.pattern = [%d{ISO8601}][%-5p][%-25c{1.}] %marker%m%n
rootLogger.level = info
rootLogger.appenderRef.console.ref = console
