Fix root log level configuration

Author: pvannierop

src/main/resources/log4j2.xml

@@ -29,7 +29,7 @@
     </appenders>
 
     <loggers>
-        <root level="INFO">
+        <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}" />