Updated openstack/openstack
Project: openstack/python-heatclient  5a78fdf4eca4d74ce32c6e31d1e01ee1d21ae06d

fixed typos found by RETF rules

rules are avaialble at https://en.wikipedia.org/wiki/Wikipedia:AutoWikiBrowser/Typos

Change-Id: If1f71f38b48a1b1a887ddc3b153e653995989cc3