Bump log4j2 version

Signed-off-by: Fabian Stäber <fabian@fstab.de>

Author: fstab

integration_tests/it_log4j2/pom.xml

@@ -12,7 +12,7 @@
     <name>Integration Tests - log4j2</name>
 
     <properties>
-        <log4j2.version>2.15.0</log4j2.version>
+        <log4j2.version>2.16.0</log4j2.version>
         <!-- I manually tested this with log4j2.version 2.3 and Java 6, and it worked fine. -->
         <!-- <log4j2.version>2.3</log4j2.version> -->
     </properties>

simpleclient_log4j2/pom.xml

@@ -41,7 +41,7 @@
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-core</artifactId>
-            <version>2.15.0</version>
+            <version>2.16.0</version>
             <scope>provided</scope>
         </dependency>