def randomize(name)
      if @options[:randomize]
        random = (0...3).map { (65 + rand(26)).chr }.join.downcase # Ex: jhx
        [name, random].join('-')
      else
        name
      end
    end
def randomize(name)
      if @options[:randomize]
        random = (0...3).map { (65 + rand(26)).chr }.join.downcase # Ex: jhx
        [name, random].join('-')
      else
        name
      end
    end
Appends a short random string at the end of the ec2 instance name.
 Later we will strip this same random string from the name.
 Very makes it convenient.  We can just type:

   forger create server --randomize

 instead of:

   forger create server-123 --profile server