message: Add Windows Server 2016 Datacenter to VM aliases.
diff: },
  "Windows":{
  + "Win2016Datacenter":{
  + "publisher":"MicrosoftWindowsServer",
  + "offer":"WindowsServer",
  + "sku":"2016-Datacenter",
  + "version":"latest"
  + },
  "Win2012R2Datacenter":{
  "publisher":"MicrosoftWindowsServer",
  "offer":"WindowsServer",
  