Tokenizer: Use SelectNodes instead of SelectSingleNode

[Gaikotsu2]

It would be nice to be able to use the XPath capabilities to update several nodes using a single XPath statement. I have a situation where the same value that needs to be placed into multiple similar xml hierarchies.

The limitation appears to be due to the use of SelectSingleNode(...) to return a single node based on the XPath supplied instead of using SelectNodes(...) and iterating over all returned nodes.

Current:

  {
    "KeyName": "/configuration/FileSystemTriggers/file/trigger[@name='Export']/conditions/condition[@name='FileExists']",
    "Attribute": "path",
    "Value": "__path.export_service.triggers__\\__ExtractFilename__"
  },
  {
    "KeyName": "/configuration/FileSystemTriggers/file/trigger[@name='Export']/conditions/condition[@name='FileStable']",
    "Attribute": "path",
    "Value": "__path.export_service.triggers__\\__ExtractFilename__"
  },

Desired:

 {
    "KeyName": "/configuration/FileSystemTriggers/file/trigger[@name='Export']/conditions/condition",
    "Attribute": "path",
    "Value": "__path.export_service.triggers__\\__ExtractFilename__"
  }