Add console appender to deprecated settings test
This commit enables the console appender for the settings deprecation
logger used in the deprecated settings logging test. This output will be
useful if this test fails again (it failed once mysteriously).
@@ -21,5 +21,6 @@ appender.deprecation_file.layout.pattern = [%p][%l] %marker%m%n
logger.deprecation.name = org.elasticsearch.deprecation.common.settings
logger.deprecation.level = warn
+logger.deprecation.appenderRef.deprecation_console.ref = console
logger.deprecation.appenderRef.deprecation_file.ref = deprecation_file
logger.deprecation.additivity = false
