[MINOR][BUILD] Update Jetty to 9.3.24.v20180605

## What changes were proposed in this pull request?

Update Jetty to 9.3.24.v20180605 to pick up security fix

## How was this patch tested?

Existing tests.

Closes apache#22055 from srowen/Jetty9324.

Authored-by: Sean Owen <srowen@gmail.com>
Signed-off-by: Sean Owen <srowen@gmail.com>

dev/deps/spark-deps-hadoop-3.1

@@ -120,8 +120,8 @@ jersey-guava-2.22.2.jar
 jersey-media-jaxb-2.22.2.jar
 jersey-server-2.22.2.jar
 jets3t-0.9.4.jar
-jetty-webapp-9.3.20.v20170531.jar
-jetty-xml-9.3.20.v20170531.jar
+jetty-webapp-9.3.24.v20180605.jar
+jetty-xml-9.3.24.v20180605.jar
 jline-2.14.3.jar
 joda-time-2.9.3.jar
 jodd-core-3.5.2.jar

pom.xml

@@ -134,7 +134,7 @@
     <orc.version>1.5.2</orc.version>
     <orc.classifier>nohive</orc.classifier>
     <hive.parquet.version>1.6.0</hive.parquet.version>
-    <jetty.version>9.3.20.v20170531</jetty.version>
+    <jetty.version>9.3.24.v20180605</jetty.version>
     <javaxservlet.version>3.1.0</javaxservlet.version>
     <chill.version>0.8.4</chill.version>
     <ivy.version>2.4.0</ivy.version>