Update to jackson-databind:2.8.11.6

Fixes gh-8273

gradle/javaprojects.gradle

@@ -21,7 +21,7 @@ ext.groovyVersion = '2.4.4'
 ext.hsqlVersion = '2.3.6'
 ext.hibernateVersion = '5.0.12.Final'
 ext.hibernateValidatorVersion = '5.3.6.Final'
-ext.jacksonDatabindVersion = '2.8.11.3'
+ext.jacksonDatabindVersion = '2.8.11.6'
 ext.javaPersistenceVersion = '2.1.1'
 ext.jettyVersion = '6.1.26'
 ext.jstlVersion = '1.2.2'