Adding another sink - metrics - for metrics 2.0 format
Adding another sink for metrics 2.0 (#174) * Adding another sink for metrics 2.0 * Fixing the configurations * Fixing the test configurations * adding iterator age metric * removing console output writer * updating timestamp extractor config in deployment template and test * typo (#177) * Making the metrics sink as optional * Fixing test cases * Adding default value to enable_metrics_sink variable * Refactoring code