Revert "Update Jetty"

This reverts commit a81f266b809a71014139daba9133045cd86ce7f4.
diff --git a/pom.xml b/pom.xml
index f08ed5d..9b7043c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -56,7 +56,7 @@
         <javax.el.version>3.0.0</javax.el.version>
         <javax.validation.version>2.0.1.Final</javax.validation.version>
         <jaxb.version>2.3.2</jaxb.version>
-        <jetty9.version>9.4.25.v20191220</jetty9.version>
+        <jetty9.version>9.4.24.v20191120</jetty9.version>
         <junit.version>4.12</junit.version>
         <kerby.version>1.1.1</kerby.version>
         <log4j.version>1.2.17</log4j.version>