Bump log4j-core from 2.14.1 to 2.17.1

Bumps log4j-core from 2.14.1 to 2.17.1.

---
updated-dependencies:
- dependency-name: org.apache.logging.log4j:log4j-core
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -38,7 +38,7 @@
         <netty.version>4.1.63.Final</netty.version>
         <jetty.version>9.4.6.v20170531</jetty.version>
         <okhttp.version>3.8.0</okhttp.version>
-        <log4j2.version>2.14.1</log4j2.version>
+        <log4j2.version>2.17.1</log4j2.version>
     </properties>
 
     <dependencies>