do not prepend dream.plugins to plugin names.

What we could imagine is a name registry mapping short friendly names to
full dotted names.

dream/platform/__init__.py

@@ -139,23 +139,13 @@ def _runSimulation(parameter_dict):
     app.logger.error(tb)
     return dict(error=tb)
 
-def getPluginNames(list):
-    plugin_name_list = []
-    plugins = list["plugin_list"]
-    for i in xrange(len(plugins)):
-        klass_name = plugins[i]["plugin"]
-        klass_name = "dream.plugins.%s" % klass_name
-        plugin_name_list.append(klass_name)
-    return plugin_name_list
-
 def getPluginRestistry(data):
     # input plugins
-    input_plugin_list = getPluginNames(data["application_configuration"]["preprocessing"])
+    input_plugin_list = data["application_configuration"]["preprocessing_plugin_list"]
     # output plugins
-    output_plugin_list = getPluginNames(data["application_configuration"]["postprocessing"])
+    output_plugin_list = data["application_configuration"]["postprocessing_plugin_list"]
     # executor plugin
-    executor_name = data["application_configuration"]["processing"]["plugin_list"][0]["plugin"]
-    executor_name = "dream.plugins.%s" % executor_name
+    executor_name = data["application_configuration"]["processing_plugin"] # XXX default value ?
     # remove the executor plugin from the input plugins list
     registry = PluginRegistry(logger=app.logger,
                               input_preparation_class_list=input_plugin_list,

dream/simulation/Examples/PartJobShopAllInOneEmpty.json

@@ -785,28 +785,24 @@
         "gadget": "Output_viewDebugJson"
       }
     },
-    "preprocessing": {
-      "plugin_list": [
+    "preprocessing_plugin_list": [
         {
-          "plugin": "PartJobShop",
-          "input_id": "Simulation"
-        }
-      ]
+          "plugin": "dream.plugins.Debug.Debug",
+          "argument": "Argument Value"
         },
-    "processing": {
-      "plugin_list": [
         {
-          "plugin": "ACO"
+          "plugin": "dream.plugins.OldStylePartJobShopWIP.OldStylePartJobShopWIP",
+          "input_id": "Simulation"
         }
-      ]
+    ],
+    "processing_plugin": {
+      "plugin": "ACO"
     },
-    "postprocessing": {
-      "plugin_list": [
+    "postprocessing_plugin_list": [
       {
         "plugin": "CalculateConfidenceIntervals"
       }
-      ]
-    },
+    ],
     "general": {
       "properties": {
         "numberOfReplications": {