raise log level on DiscoveryService to filter out ENR-related messages

Author: Jaap van der Plas

src/main/resources/logback.xml

@@ -59,6 +59,7 @@
 
     <logger name="io.netty" level="WARN"/>
     <logger name="io.iohk.scalanet" level="INFO" />
+    <logger name="io.iohk.scalanet.discovery.ethereum.v4.DiscoveryService" level="WARN" />
     <logger name="io.iohk.ethereum.blockchain.sync.SyncController" level="INFO" />
     <logger name="io.iohk.ethereum.network.PeerActor" level="${LOGSLEVEL}" />
     <logger name="io.iohk.ethereum.network.rlpx.RLPxConnectionHandler" level="${LOGSLEVEL}" />