addTask sets default expiry time in SAS token too short for long running jobs

[zerweck]

When adding a task, the creation of the upload token for the standard job files like the file 1.txt containing the log of task 1 ignores if the user maybe has set a longer expiry time for their output files.

In my case I have long running tasks and changed the following line from the documentation example https://github.com/Azure/doAzureParallel/blob/2b8f388dc476a3a51aa71c3ab1165d080ad08fe8/docs/72-persistent-storage.md#L63 to

# make token expire 20 days after creation
writeToken <- storageClient$generateSasToken("w", "c", outputFolder, end = Sys.time() + 60 * 60 * 24 * 20) 

So the SAS token for my output files now has the se parameter in the URI like this: [...]&se=2019-08-18T11%3A11%3A48Z&[...] while in the URI for 1.txt it looks like this: [...]&se=2019-07-31T11%3A11%3A59Z&[...] so my own upload gets ignored because the task crashes with a FileUploadAccessDenied Error for the 1.txt before my upload is run.

I am not sure if this is definied here https://github.com/Azure/doAzureParallel/blob/96bfc226628a5f0e58c52d2f0e4f76b76e3bf2e9/R/batch-api.R#L79 or here https://github.com/Azure/doAzureParallel/blob/96bfc226628a5f0e58c52d2f0e4f76b76e3bf2e9/R/doAzureParallel.R#L560-L566

If you could point me in the right direction I could try a fix.