Containers env vars C1 and C2 expected

[nzthiago]

The two Clean Trigger functions seem to expect environment variables C1 and C2 to exist:
https://github.com/Azure-Samples/functions-python-data-cleaning-pipeline/blob/master/CleanTrigger1/clean.py#L12
https://github.com/Azure-Samples/functions-python-data-cleaning-pipeline/blob/master/CleanTrigger2/clean.py#L12

But those are not created through the ARM template