AWS SDK のデバッグログを取得する

# AWS
log4j.appender.aws = org.apache.log4j.RollingFileAppender
log4j.appender.aws.MaxFileSize = 1000KB
log4j.appender.aws.MaxBackupIndex = 30
log4j.appender.aws.file = ${catalina.base}/logs/aws.log
log4j.appender.aws.layout = org.apache.log4j.PatternLayout
log4j.appender.aws.layout.conversionPattern =%d <%-5p> (%t) [%F:%L]- %m%n
log4j.appender.aws.append = true

log4j.category.com.amazonaws = debug, aws