Update to Jettison 1.5.4

Author: onobc

spring-cloud-dataflow-parent/pom.xml

@@ -30,7 +30,7 @@
 		<semver.version>2.2.0</semver.version>
 		<apache-directory-server.version>1.5.5</apache-directory-server.version>
 		<codearte-props2yml.version>0.5</codearte-props2yml.version>
-		<jettison.version>1.5.2</jettison.version>
+		<jettison.version>1.5.4</jettison.version>
 		<snakeyaml.version>1.33</snakeyaml.version>
 		<json-unit.version>2.11.1</json-unit.version>
 		<findbugs.version>3.0.2</findbugs.version>