pep8: Permit ".)" at the end of resource docs
pep8: Permit ".)" at the end of resource docs

When a sentence is wholly contained within parentheses, the period at
the end should appear inside the closing parenthesis. The current pep8
check requires that e.g. resource property descriptions must end with a
period, which makes things awkward when the last sentence is
parenthesised. Allow them to optionally end with ".)" instead.

Change-Id: I489c424136047e57e4649739fd0b0727bc3cc915

openstack/heat,openstack/heat