Update parent version to support building with JDK8.

https://issues.jenkins-ci.org/browse/JENKINS-23239

Author: Jmcfar

pom.xml

@@ -3,7 +3,7 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>1.554</version>
+    <version>1.554.1</version>
   </parent>
 
   <artifactId>codedeploy</artifactId>