-azure_storage_blob-12.3.2:

• Azure SDK for Python:
• Windows 10:
• Python 3.0:

Describe the bug
I have a customer, she wrote some code wanted to get a MD5 content, it was supposed to return a string, but she got a byte array.

To Reproduce
Steps to reproduce the behavior:

1. Running the code below:
   from azure.storage.blob import BlobServiceClient
   blob_service_client = BlobServiceClient.from_connection_string(connect_str);
   container_client = blob_service_client.get_container_client(container_name)
   blob_list = container_client.list_blobs(name_starts_with=src);
   for blob in blob_list:
   print( blob.name + "\t" + str(blob.content_settings.content_md5) )

Output:
quickstart.txt bytearray(b'\x93\x8f1xZ\xc2]\xc1\xcb\x1f\xd5\x10\xef .\x92')

Expected behavior
Return result should be a string: 'k48xeFrCXcHLH9UQ7yAukg==

Screenshots
N/A

Additional context
Background information from my customer:

from azure.storage.blob import BlockBlobService
block_blob_service = BlockBlobService(account_name=acct_name, account_key=acct_key)
blob_list = block_blob_service.list_blobs(container_name, src, include='metadata')
for blob in blob_list:
print blob.name + "\t" + blob.properties.content_settings.content_md5
The code above works well. But we upgraded our system to python 3 and some featuresare gone, for example, 'blob_tier' is not an attribute of Blobproperties under BlockBlobService.

That is the reason we changed to BlobServiceClient. Then I encountered ‘md5’ issue.