Upgrade to Jackson 2.7.1

Release notes:

https://github.com/FasterXML/jackson/wiki/Jackson-Release-2.7.1

pom.xml

@@ -312,7 +312,7 @@
     <dependency>
       <groupId>com.fasterxml.jackson.dataformat</groupId>
       <artifactId>jackson-dataformat-xml</artifactId>
-      <version>2.7.0</version>
+      <version>2.7.1</version>
     </dependency>
     <dependency>
       <groupId>commons-fileupload</groupId>