Update log4j to 2.17 (#6438)

(cherry picked from commit 91cdcf2)

Author: rawlinp

CHANGELOG.md

@@ -7,7 +7,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 ## [6.0.2] - 2021-12-17
 ### Changed
-- Updated `log4j` module in Traffic Router from version 1.2.17 to 2.16.0
+- Updated `log4j` module in Traffic Router from version 1.2.17 to 2.17.0
 - Update github.com/lestrrat-go/jwx to v1.2.12
 
 ## [6.0.1] - 2021-11-04

traffic_router/pom.xml

@@ -33,7 +33,7 @@
 	<properties>
 		<deploy.dir>/opt/traffic_router</deploy.dir>
 		<spring.version>5.2.9.RELEASE</spring.version>
-		<log4j.version>2.16.0</log4j.version>
+		<log4j.version>2.17.0</log4j.version>
 		<junit.version>4.12</junit.version>
 		<hamcrest.version>1.3</hamcrest.version>
 		<geoip2.version>2.1.0</geoip2.version>