[FIX] Update sample env file keys for S3 and Azure (#177)

Update sample env file keys for s3 and azure

Author: harini-venkataraman

tests/sample.env

@@ -24,9 +24,9 @@ TEXT_CONTENT=Writing directly from string as read_file is not passed
 FILE_STORAGE_GCS='{"token": "/path/to/google/creds.json"}'
 FILE_STORAGE_MINIO='{"endpoint_url": "http://localhost:9000","key": "xxxx", "secret": "xxxx"}'
 FILE_STORAGE_LOCAL='{"auto_mkdir": True}'
-FILE_STORAGE_AZURE = '{"azure_account_name":"xxxx","azure_access_key":"XXX","connection_string":"xxxx","azure_bucket_name":"fsspec-test"}'
-FILE_STORAGE_S3 = '{"s3_key":'xxxx',"s3_secret":'XXXX',"s3_bucket":'fsspec-test',"s3_endpoint":'https://s3.ap-south-1.amazonaws.com/',"s3_region":'ap-south-1'}'
+FILE_STORAGE_AZURE = '{"account_name":"xxxx","access_key":"XXX","connection_string":"xxxx","bucket_name":"fsspec-test"}'
+FILE_STORAGE_S3 = '{"key":'xxxx',"secret":'XXXX',"endpoint_url":'https://s3.ap-south-1.amazonaws.com/'}'
 TEST_PERMANENT_STORAGE_GCS='{"provider": "gcs", "credentials": {"token": "/path/to/google/creds.json"}}'
 TEST_TEMPORARY_STORAGE='{"provider": "minio", "credentials": {"endpoint_url": "http://unstract-minio:9000", "key": "xxxx", "secret": "xxxx"}}'
 TEST_LOCAL_STORAGE='{"provider":"local"}'
-TEST_PERMANENT_STORAGE_AZURE = '{"provider": "abfs", "credentials": {"azure_account_name":"unstractpocstorage","azure_access_key":"xxxx","azure_bucket_name":"fsspec-test","connection_string":"xxxx"}}'
+TEST_PERMANENT_STORAGE_AZURE = '{"provider": "abfs", "credentials": {"account_name":"unstractpocstorage","access_key":"xxxx","bucket_name":"fsspec-test","connection_string":"xxxx"}}'