Avoid printing error logs when there are no records in the queue #674
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This PR includes the changes also for logging.
We include libraries that contain different logging implementation(java.util.logging(JUL) and slf4j).
Included log4j adapter for JUL so that all JUL logs are routed to log4j
Included Slf4j log4j implementation (version 2) so that slf4j logs are routed to log4j
closes: #578
closes: #642
closes: #667
closes: #666