fix: upgrade org.eclipse.jetty:jetty-jmx from 9.4.22.v20191022 to 9.4.26.v20200117

Snyk has created this PR to upgrade org.eclipse.jetty:jetty-jmx from 9.4.22.v20191022 to 9.4.26.v20200117.

See this package in NPM:
https://www.npmjs.com/package/org.eclipse.jetty:jetty-jmx

See this project in Snyk:
https://app.snyk.io/org/scm-manager/project/9ae37cfe-98a5-4b6b-bbf7-ffa5cde55e58?utm_source=github&utm_medium=upgrade-pr

pom.xml

@@ -847,7 +847,7 @@
     <legman.version>1.6.2</legman.version>
 
     <!-- webserver -->
-    <jetty.version>9.4.22.v20191022</jetty.version>
+    <jetty.version>9.4.26.v20200117</jetty.version>
     <jetty.maven.version>9.4.22.v20191022</jetty.maven.version>
 
     <!-- security libraries -->
@@ -870,7 +870,7 @@
     <project.test.javaLevel>8</project.test.javaLevel>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <netbeans.hint.license>SCM-BSD</netbeans.hint.license>
-    <jdk.classifier />
+    <jdk.classifier/>
     <org.mapstruct.version>1.2.0.Final</org.mapstruct.version>
 
     <!-- Sonar exclusions -->