jboss-ejb3.xml validation error in JBoss Developer Studio(JBDS) / Eclipse

Issue

• I have a jboss-ejb3.xml configuration file, I created it following Development Guide, the schema file is here: jboss-ejb3-2_0.xsd. And I have validation error when enable xml validator in Eclipse / JBDS 7.
• I have xml validation error in Eclipse, the error happens even for an empty file, example jboss-ejb3.xml:

<?xml version="1.0" encoding="UTF-8"?>
<jboss:ejb-jar
        xmlns="http://java.sun.com/xml/ns/javaee"
        xmlns:jboss="http://www.jboss.com/xml/ns/javaee"
        xmlns:security="urn:security"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="
                http://www.jboss.com/xml/ns/javaee http://www.jboss.org/j2ee/schema/jboss-ejb3-2_0.xsd
                http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/ejb-jar_3_1.xsd"
        version="3.1">

    <assembly-descriptor>
    </assembly-descriptor>
</jboss:ejb-jar>