Upgrade Jetty version.

gradle/javaprojects.gradle

@@ -7,7 +7,7 @@ ehcacheVersion = '1.6.2'
 aspectjVersion = '1.6.10'
 apacheDsVersion = '1.5.5'
 jstlVersion = '1.2'
-jettyVersion = '6.1.22'
+jettyVersion = '6.1.26'
 hsqlVersion = '1.8.0.10'
 slf4jVersion = '1.6.1'
 logbackVersion = '0.9.29'