Updated openstack/openstack
Project: openstack/heat  8a08db720d60d7bf13d17a2854da86bcbfffb87c
null
Simplify update_with_template() method

self.nested() was tested against None at 2 different places in the
method. It is now tested once and if it is None, the method fails
early.

Change-Id: I1296003b359b463126536f3e45c09bd2f22aa18b