[NETBEANS-5114] add missing namespace for facelets composition template client

enterprise/web.jsf/src/org/netbeans/modules/web/jsf/facelets/resources/templates/compositionTemplateClient.template

 <?xml version='1.0' encoding='UTF-8' ?>
 <!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-<ui:composition xmlns:ui="__NS_LOCATION__/jsf/facelets"
+<ui:composition xmlns="http://www.w3.org/1999/xhtml"
+                xmlns:ui="__NS_LOCATION__/jsf/facelets"
                 template="__TEMPLATE__">
     __DEFINE_TAGS__
 </ui:composition>
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