Bump the version of Jetty we claim to be

The shaded jetty now tracks a more recent Jetty

Author: shs96c

third_party/java/jetty/jetty.pom

@@ -5,7 +5,7 @@
 
   <groupId>org.seleniumhq.selenium</groupId>
   <artifactId>jetty-repacked</artifactId>
-  <version>9.2.13.v20150730</version>
+  <version>-9.4.1.v20170120</version>
 
   <name>selenium-jetty-server-repacked</name>
   <description>Browser automation framework dependency on jetty</description>