minor change of log output from debug to trace

Author: JonasVautherin

sdk/mavsdk/src/main/java/io/mavsdk/System.java

@@ -26,7 +26,7 @@ public class System {
   /**
    * Create a System object, initializing the plugins and connecting them to mavsdk_server.
    *
-   * This defaults to a mavsdk_server running on localhost:50051.
+   * <p>This defaults to a mavsdk_server running on localhost:50051.</p>
    */
   public System() {
     this("localhost", 50051);

sdk/templates/file.j2

@@ -31,7 +31,7 @@ public class {{ plugin_name.upper_camel_case }} {
   }
 
   private static ManagedChannel createChannel(String host, int port) {
-    logger.debug("Building channel to " + host + ":" + port);
+    logger.trace("Building channel to " + host + ":" + port);
 
     return OkHttpChannelBuilder.forAddress(host, port)
         .usePlaintext()