Missing SLF4J bindings for Log4j

[danotorrey]

The SLF4J/Log4j bindings are missing the this repository, which results in the following error. Add the correct bindings to route AWS SDK log messages to Log4j.

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

[danotorrey]

See https://github.com/Graylog2/graylog-s3-lambda/blob/9aa3ac2cb7e61848aec81cb5e59fcef7a2adcb30/pom.xml#L80