use current date for tasks

[esteinholtz-cloudera]

I had problems getting a fully up-to-date report using the notebook supplied, so I added usage of current date.

[ed-donner]

hey @esteinholtz-cloudera - any chance that this could go into community contributions? If you'd like to make a change to the main repo then I do agree that this is a good change to make, but I'd be fussy and ask that you come up with the current date in a more expected way - just import date at the top of that module, and set the current_date based on that.. or is there a particular reason for the dynamic import?