heat tests : autoscaling test add missing VerifyAll

Add logic to verify stubbed calls to loadbalancer reload,
also break up the tests a bit into functionally related
chunks instead of having two mega-tests

Change-Id: I94897b6ec23cae92bc464b4b3ef2a7b634bfdb0c
Signed-off-by: Steven Hardy <shardy@redhat.com>
Merge "heat tests : autoscaling test add missing VerifyAll"