Filter out warnings caused by cryptography in rb-site.
Review Request #11360 — Created Jan. 7, 2021 and submitted
rb-sitewith any modern version of the
module, a warning will be shown about cryptography dropping Python 2
support. This wasn't caught by the
PendingDeprecationWarning, as they
output it as a
UserError. We now filter these out, which also catches
a few others that could come up (like
pdfminer.sixfrom Power Pack).
rb-siteon Python 2.7. Saw the warnings go away.