luoapi: make logging nice and boring

experimental/uloapi/src/main/resources/logback.xml

 <configuration>
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
         <encoder>
-            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+            <pattern>%date{yyyy/MM/dd HH:mm:ss} %file:%line: %msg%n%throwable</pattern>
         </encoder>
     </appender>