Nypl-py-utils

- Added patron_data_helper functions
- Use executemany instead of execute when appropriate in PostgreSQLClient
- Add capability to retry connecting to a database to the MySQL, PostgreSQL, and Redshift clients
- Automatically close database connection upon error in the MySQL, PostgreSQL, and Redshift clients
- Delete old PostgreSQLPoolClient, which was not production ready

- Added cloudLibrary client

- Added SFTP client

- Replaced info statements with debug for security purposes

- Replaced log statement in Avro client with debug

- Added SecretsManager client