[JENKINS-1034] Fixed default value

core/src/main/java/hudson/tasks/BuildTrigger.java

@@ -301,7 +301,7 @@ public class BuildTrigger extends Recorder implements DependecyDeclarer {
             }
             return new BuildTrigger(
                 childProjectsString,
-                formData.getString("threshold"));
+                formData.optString("threshold", Result.SUCCESS.toString()));
         }
 
         @Override

core/src/main/resources/hudson/tasks/BuildTrigger/config.jelly

@@ -31,6 +31,10 @@ THE SOFTWARE.
                field="childProjects"/>
 	</f:entry>
   <j:if test="${descriptor.showEvenIfUnstableOption(targetType)}">
+  	<f:entry title="">
+      <f:radio name="threshold" checked="${instance.threshold==null || instance.threshold.toString()=='SUCCESS'}"
+              title="${%Trigger only if build succeeds}" value="SUCCESS"/>
+    </f:entry>
     <f:entry title="">
       <f:radio name="threshold" checked="${instance.threshold.toString()=='UNSTABLE'}"
               title="${%Trigger even if the build is unstable}" value="UNSTABLE"/>

core/src/main/resources/hudson/tasks/BuildTrigger/config_fr.properties

@@ -21,5 +21,6 @@
 # THE SOFTWARE.
 
 Projects\ to\ build=Projets à construire
+Trigger\ only\ if\ build\ succeeds=Déclencher uniquement si le build réussit
 Trigger\ even\ if\ the\ build\ is\ unstable=Déclencher même si le build est instable
 Trigger\ even\ if\ the\ build\ fails=Déclencher même si le build échoue