Update log4j to version 2.15.0 (#492)

(cherry picked from commit 2dfacfc)

Author: sgrampone

java/pom.xml

@@ -47,12 +47,12 @@
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-1.2-api</artifactId>
-            <version>2.13.3</version>
+            <version>2.15.0</version>
         </dependency>
 		<dependency>
 			<groupId>org.apache.logging.log4j</groupId>
 			<artifactId>log4j-core</artifactId>
-			<version>2.13.3</version>
+			<version>2.15.0</version>
 		</dependency>
 		<dependency>
 			<groupId>javax.ejb</groupId>