As we've moved to more dynamic generation of variables, the correct
variable names are *ControllerOpenstack* not *Controller* for the
example standalone environment.
Change-Id: Iaa39de9d8794a856e76cc9995d046484632cf604
Closes-Bug: #1721877
# Format for Controller node hostnames Note %index% is translated into the index of the node, e.g 0/1/2 etc and %stackname% is replaced with the stack name e.g overcloud
# Format for ControllerOpenstack node hostnames Note %index% is translated into the index of the node, e.g 0/1/2 etc and %stackname% is replaced with the stack name e.g overcloud