title: Create and upload a file on selenium grid
body: <p>One of tthe test cases that I have is to upload a file to the application. Witouth grid this can be easily done by creating a bogus file and get absolute path of the file and fill the input field and click upload. However when I am using grid, the file is not on the machine that hosted the node. Is there anyway to either send the file to the node or tell the node to create the file and get the absolute path.</p>