azure-ts-functions-many is missing AzureWebJobsStorage

[tpaulshippy]

In order for an Azure function to work, it needs the app setting AzureWebJobsStorage to be set (to hold function and host keys).

The example at https://github.com/pulumi/examples/tree/master/azure-ts-functions includes this (https://github.com/pulumi/examples/blob/cdc935d7cd0e9b4049f4c24b1c77214af3992bf2/azure-ts-functions/index.ts#L58). The example at https://github.com/pulumi/examples/tree/master/azure-ts-functions-many does not.

This caused us some confusion.