Add hashcode

infrastructure/src/main/java/org/springframework/batch/repeat/ExitStatus.java

@@ -139,6 +139,15 @@ public class ExitStatus implements Serializable {
 		return toString().equals(obj.toString());
 	}
 
+	/**
+	 * Compatible with the equals implementation.
+	 * 
+	 * @see java.lang.Object#hashCode()
+	 */
+	public int hashCode() {
+		return toString().hashCode();
+	}
+
 	/**
 	 * Add an exit code to an existing {@link ExitStatus}.
 	 *