gwt-servlet should'nt embed validation API and implementation from hibernate

17:50:42,574 WARN  [org.jboss.modules] (default task-5) Failed to define class org/hibernate/validator/ValidationMessages in Module "deployment.nuxeo.war:main" from Service Module Loader: java.lang.Linkag
eError: Failed to link org/hibernate/validator/ValidationMessages (Module "deployment.nuxeo.war:main" from Service Module Loader)
        at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:487) [jboss-modules.jar:1.3.4.Final]
        at org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:277) [jboss-modules.jar:1.3.4.Final]
        at org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:92) [jboss-modules.jar:1.3.4.Final]
        at org.jboss.modules.Module.loadModuleClass(Module.java:568) [jboss-modules.jar:1.3.4.Final]
        at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:205) [jboss-modules.jar:1.3.4.Final]
        at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:459) [jboss-modules.jar:1.3.4.Final]
        at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:408) [jboss-modules.jar:1.3.4.Final]
        at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:389) [jboss-modules.jar:1.3.4.Final]
        at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:134) [jboss-modules.jar:1.3.4.Final]
        at java.util.ResourceBundle$Control.newBundle(ResourceBundle.java:2640) [rt.jar:1.8.0]
        at org.nuxeo.ecm.webapp.seam.messages.HotReloadResourceBundleControl.newBundle(HotReloadResourceBundleControl.java:63) [nuxeo-platform-webapp-base-5.9.6-SNAPSHOT.jar:]
        at java.util.ResourceBundle.loadBundle(ResourceBundle.java:1501) [rt.jar:1.8.0]
        at java.util.ResourceBundle.findBundle(ResourceBundle.java:1465) [rt.jar:1.8.0]
        at java.util.ResourceBundle.findBundle(ResourceBundle.java:1419) [rt.jar:1.8.0]
        at java.util.ResourceBundle.findBundle(ResourceBundle.java:1419) [rt.jar:1.8.0]
        at java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1361) [rt.jar:1.8.0]
        at java.util.ResourceBundle.getBundle(ResourceBundle.java:1299) [rt.jar:1.8.0]