Merge pull request #1359 from coheigea/patch-1

AMQ-9628 - Update XStream to 1.4.21

Author: jbonofre

pom.xml

@@ -102,7 +102,7 @@
     <taglibs-version>1.2.5</taglibs-version>
     <velocity-version>2.4.1</velocity-version>
     <xpp3-version>1.1.4c</xpp3-version>
-    <xstream-version>1.4.20</xstream-version>
+    <xstream-version>1.4.21</xstream-version>
     <xbean-version>4.26</xbean-version>
     <xerces-version>2.12.2</xerces-version>
     <jaxb-tools-version>4.0.8</jaxb-tools-version>