Fix compilation error

Change call to `getNewObjectId()` to `getRefName()` to make the
plugin buildable.

Also fix a whitespace error.

Change-Id: I3be828ee856fef63aedb3b7d2303ebfd0920918e
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/jira/JiraClientSession.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/jira/JiraClientSession.java
index daa078d..0fab0e6 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/jira/JiraClientSession.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/jira/JiraClientSession.java
@@ -19,7 +19,7 @@
 public class JiraClientSession {
   private final XmlRpcClient rpc;
   private String sessionId;
-  
+
   public JiraClientSession(XmlRpcClient rpc, String sessionId) {
     this.rpc = rpc;
     this.sessionId = sessionId;
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/jira/RefUpdated.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/jira/RefUpdated.java
index 964bb43..11fc3a1 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/jira/RefUpdated.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/jira/RefUpdated.java
@@ -79,7 +79,7 @@
 
       try {
         for (Update u : event.getUpdates()) {
-          String newObjId = u.getNewObjectId();
+          String newObjId = u.getRefName();
           if (newObjId == null) {
             continue;
           }