Add the task to the accumulator before running.

Instead of only adding the task to the rollback
accumulator after it has ran it is useful to add
it to the accumulator before it runs so that if
said task fails while running it can get a chance
at undoing anything it might have done.

Change-Id: I5c9cf2fd194e3b42639d84a0d9dfed3a3b5a797d
Merge "Add the task to the accumulator before running."