iot-dr-r53-health-checker.py is not resetting RECEIVED_COUNT and RECEIVED_ALL_EVENT

[brnaba-aws]

After the first lambda execution, if the publish and received worked, then changing the iot policy will have no effect on the code.
RECEIVED_COUNT and RECEIVED_ALL_EVENT are never reset, so on the next execution, their value are the same.
You have to wait the next lambda execution environment to have those value reset.
Expected behaviour: Changing iot policy should impact current lambda execution environment.
How to fix: Reset those 2 variables before exiting lambda.

[brnaba-aws]

disaster-recovery-for-aws-iot/source/lambda/iot-dr-r53-health-check/iot-dr-r53-health-checker.py

Line 39 in c8a5d80

RECEIVED_COUNT = 0

and

disaster-recovery-for-aws-iot/source/lambda/iot-dr-r53-health-check/iot-dr-r53-health-checker.py

Line 40 in c8a5d80

RECEIVED_ALL_EVENT = threading.Event()