Don't delete InternetGatewayDevice tree when reinitializing device

acs.coffee

@@ -117,12 +117,10 @@ updateDevice = (currentRequest, actions, callback) ->
         )
       else if updates['_lastBootstrap']?
         # reinitialize on bootstrap event (e.g. firmware upgrade)
-        db.devicesCollection.update({'_id' : currentRequest.deviceId}, {'$unset' : 'InternetGatewayDevice'}, {safe: true}, (err, count) ->
         task = {device : currentRequest.deviceId, name : 'init', timestamp : config.INIT_TIMESTAMP}
         apiFunctions.insertTasks(task, (err) ->
           callback(err) if callback?
         )
-        )
       else
         callback() if callback?
     )

tasks.coffee

@@ -108,11 +108,12 @@ this.getParameterNames = (task, methodResponse, callback) ->
     deviceUpdates = {parameterNames : methodResponse.parameterList}
     path = if common.endsWith(task.parameterPath, '.') then task.parameterPath.slice(0, -1) else task.parameterPath
     projection = {}
-    projection[path] = 1
+    projection[path] = 1 if !!task.parameterPath
 
     # delete nonexisting params
     db.devicesCollection.findOne({_id : task.device}, projection, (err, device) ->
       if device
+        if !!task.parameterPath
           root = device
           rootPath = ''
           ps = path.split('.')
@@ -123,6 +124,9 @@ this.getParameterNames = (task, methodResponse, callback) ->
             else
               root = null
               break
+        else
+          root = device['InternetGatewayDevice']
+          rootPath = 'InternetGatewayDevice.'
 
         if root
           deviceUpdates.deletedObjects = []