I use OAUTH but it should be similar.

What I use (and it works):

"fs.azure.account.auth.type": "OAuth", (for you this is SharedKey I presume)

I don't think you have to pass the storage accountname in the extra_configs (or dfs.core.windows.net)

So I would try with just fs.azure.account.key and fs.azure.account.auth.type

That being said: Oauth is the way to go if you are going to a production scenario.