Give meaningful names to elements of Arrays

Also make some changes to Mistral schema.

Change-Id: Id9efcd9b7d12697c68226fa104545cf737d62679

js/merlin.js

@@ -106,7 +106,7 @@ $(function() {
             var length = item.length(),
                 subItem = item.get(length-1),
                 nameEntity = extractNameSubItem(subItem),
-                label = 'Element #'+length,
+                label = extractBaseName(subItem, 'Element') + '#' + length,
                 $childLabel = createNewLabel(label).append($removeAction);
 
             if ( nameEntity ) {
@@ -156,6 +156,11 @@ $(function() {
         return item.instanceof(Barricade.Container) && item.get('name');
     }
 
+    function extractBaseName(item, defaultBaseName) {
+        defaultBaseName = defaultBaseName || 'Element';
+        return item.name || defaultBaseName;
+    }
+
     function drawFluidContainerNode($label, item) {
         var $item = $('<div class="inner-node"></div>'),
             labelId = $label.attr('id'),

js/schema.js

@@ -105,9 +105,14 @@
 
      'name': {'@type': String},
      'parameters': {
-         '@type': Object,
-         '@required': false,
-         '?': {'@type': String}
+         '@type': Array,
+         '*': {
+             '@class': Barricade.Primitive.extend({
+                 'name': 'Parameter'
+             }, {
+                 '@type': String
+             })
+         }
      },
      'publish': {
          '@type': String,
@@ -235,9 +240,15 @@
          '@default': 'direct'
      },
      'parameters': {
-         '@type': Object,
+         '@type': Array,
          '@required': false,
-         '?': {'@type': String}
+         '*': {
+             '@class': Barricade.Primitive.extend({
+                 'name': 'Primitive'
+             }, {
+                 '@type': String
+             })
+         }
      },
      'output': {
          '@type': String,
@@ -260,15 +271,15 @@
          '@required': false
      },
      'actions': {
-         '@type': Array,
+         '@type': Object,
          '@required': false,
-         '*': {
+         '?': {
              '@class': types.Mistral.Action
          }
      },
      'workflows': {
-         '@type': Array,
-         '*': {
+         '@type': Object,
+         '?': {
              '@class': types.Mistral.Workflow
          }
      }