[storage] sas token is not in the same argument group as the rest of the storage arguments

[BurtBiel]

Storage Account Arguments
--account-key : Storage account key. Must be used in conjunction with storage
account name. Environment variable: AZURE_STORAGE_KEY.
--account-name : Storage account name. Must be used in conjunction with either
storage account key or a SAS token. Environment variable:
AZURE_STORAGE_ACCOUNT.
--connection-string : Storage account connection string. Environment variable:
AZURE_STORAGE_CONNECTION_STRING.

Pre-condition Arguments
--if-match : An ETag value, or the wildcard character (). Specify this
header to perform the operation only if the resource's ETag
matches the value specified.
--if-modified-since : Alter only if modified since supplied UTC datetime
(Y-m-d'T'H:M'Z').
--if-none-match : An ETag value, or the wildcard character (). Specify this
header to perform the operation only if the resource's ETag does
not match the value specified. Specify the wildcard character
(*) to perform the operation only if the resource does not
exist, and fail the operation if it does exist.
--if-unmodified-since : Alter only if unmodified since supplied UTC datetime
(Y-m-d'T'H:M'Z').

Storage Account Arguments
--sas-token : A Shared Access Signature (SAS). Must be used in conjunction
with storage account name. Environment variable:
AZURE_STORAGE_SAS_TOKEN.

[tjprescott]

This was supposed to have been fixed in #845. I'll check it out.