CLOUDSTACK-8103: Vmsync marks VM as stopped even after failing to stop it in HV
During vmsync if StopCommand (issued as part of PowerOff/PowerMissing report) fails to stop VM (since VM is running on HV),
don't transition VM state to "Stopped" in CS db. Also added a check to throw ConcurrentOperationException if vm state is not
"Running" after start operation.
CLOUDSTACK-8100: Fixed pep8 issues in test_vpc.py

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-8095: Fixed Iso attach issue in test_escalations_instances.py

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>