TP-62059 || Fix litmus_proxy metrics not getting emitted (#102)

* TP-62059 || Add caching to update enabled experiments.

* TP-62059 || Make all the fields serializable to be dumped to Redis

* TP-62059 || Refreshing enabled experiments

* TP-62059 || Remove app_name tag from metric customizer as it conflicts with app_name in litmus_client jar

litmus-util/src/main/java/com/navi/medici/metrics/MetricsRegistry.java

@@ -23,7 +23,6 @@ public class MetricsRegistry {
     MeterRegistryCustomizer<MeterRegistry> metricsCommonTags() {
         InetAddress inetAddress = inetAddress();
         return registry -> registry.config()
-            .commonTags("app.name", appName)
             .commonTags("host.ip", inetAddress.getHostAddress().trim())
             .commonTags("host.name", inetAddress.getHostName().trim());
     }