Make workflow filter resolution compatible between Web UI and JSF UI

xxx:~/9.10-workspace/nuxeo/addons/nuxeo-platform-document-routing$ git diff
diff --git i/nuxeo-routing-core/src/main/java/org/nuxeo/ecm/platform/routing/core/io/TaskWriter.java w/nuxeo-routing-core/src/main/java/org/nuxeo/ecm/platform/routing/core/io/TaskWriter.java
index 2638af4c..146d002c 100644
--- i/nuxeo-routing-core/src/main/java/org/nuxeo/ecm/platform/routing/core/io/TaskWriter.java
+++ w/nuxeo-routing-core/src/main/java/org/nuxeo/ecm/platform/routing/core/io/TaskWriter.java
@@ -28,7 +28,9 @@ import static org.nuxeo.ecm.core.io.registry.reflect.Priorities.REFERENCE;
 import java.io.Closeable;
 import java.io.IOException;
 import java.io.OutputStream;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;

 import javax.inject.Inject;

@@ -187,7 +189,7 @@ public class TaskWriter extends ExtensibleEntityJsonWriter<Task> {
                 jg.writeArrayFieldStart('taskActions');
                 for (Button button : node.getTaskButtons()) {
                     if (StringUtils.isBlank(button.getFilter()) || actionManager.checkFilter(button.getFilter(),
-                            createActionContext(wrapper.getSession()))) {
+                            createActionContext(node, wrapper.getSession()))) {
                         jg.writeStartObject();
                         jg.writeStringField('name', button.getName());
                         jg.writeStringField('url', ctx.getBaseUrl() + 'api/v1/task/' + item.getDocument().getId() + '/';
@@ -268,10 +270,11 @@ public class TaskWriter extends ExtensibleEntityJsonWriter<Task> {
         jg.writeStringField('workflowInitiator', workflowInitiator);
     }

-    protected static ActionContext createActionContext(CoreSession session) {
+    protected static ActionContext createActionContext(GraphNode node, CoreSession session) {
         ActionContext actionContext = new ELActionContext();
-        actionContext.setDocumentManager(session);
-        actionContext.setCurrentPrincipal((NuxeoPrincipal) session.getPrincipal());
+        Map<String, Object> workflowContextualInfo = new HashMap<String, Object>();
+        workflowContextualInfo.putAll(node.getWorkflowContextualInfo(session, true));
+        actionContext.putAllLocalVariables(workflowContextualInfo);
         return actionContext;
     }