Fix root log level configuration

Author: pvannierop

src/main/resources/log4j2.xml

@@ -28,8 +28,8 @@
         <Sentry name="Sentry" debug="false"/>
     </appenders>
 
-    <loggers>
-        <root level="INFO">
+    <loggers>L
+        <root level="${env:LOG4J_LOG_LEVEL:-INFO}">
             <appender-ref ref="Console" />
             <!-- Note that the Sentry logging threshold is at ERROR level by default -->
             <appender-ref ref="Sentry" level="${env:SENTRY_LOG_LEVEL:-ERROR}" />