Converge all storage references to the account provider

#### What problem would the feature you're requesting solve? Please describe.
There are uses of Azure Storage within the host that does not use the account provider abstraction that exists

#### Describe the solution you'd like
We converge these references so that there is a single abstraction allowing for changes across the host.

The issue identifies Azure Storage references within the host and an existing account provider abstraction, but names no files or tests. Start by locating those references and mapping how the account provider is used; done means the host's storage references converge on that single abstraction.

Written by the indexing model from the issue text.