discordSend: Send an embed message to Webhook URL

• webhookURL : String
  If you don't have a webhook url take a look at this intro to Discord Webhooks.
  Paste the entire url in the textbox.
• customAvatarUrl : String (optional)
• customUsername : String (optional)
• description : String (optional)
  Message text which supports limited markdown.
  
  See Markdown Text 101 (Chat Formatting: Bold, Italic, Underline) for more info on markdown support.
• dynamicFieldContainer : String (optional)
• enableArtifactsList : boolean (optional)
• footer : String (optional)
  Text in footer of message
• image : String (optional)
  URL of the image under everything
• link : String (optional)
  When set the title of the message comes clickable and leads to this url.
  
  To link the executed job use env.BUILD_URL.
  This requires Jenkins URL to be set in Global Settings.
• notes : String (optional)
• result : String (optional)
  Enum to set the build result. Accepts values SUCCESS|UNSTABLE|FAILURE|ABORTED. This field is preferred over success and unstable.
• scmWebUrl : String (optional)
• showChangeset : boolean (optional)
• successful : boolean (optional)
  Either colors the message as green or red depending on success.
  Use currentBuild.resultIsBetterOrEqualTo('SUCCESS') to color the message green on success or red otherwise.
• thumbnail : String (optional)
  URL to image displayed on the right.
• title : String (optional)
  Message title
  To set title to job name, use env.JOB_NAME.
• unstable : boolean (optional)
  Set to true to set the color to yellow (only when the build was successful, else this is omitted).