CIS2 client does not use base64 padding for the schema

[orhoj]

Bug Description

When creating a CIS2 transfer the base64 encoding of the schema is not properly base64 padded.

Steps to Reproduce

Use the CIS2 client to create a CIS2 transfer. Note that the base64 encoding of the schema is not padded.

Expected Result

The base64 encoding of the schema must be padded.

Actual Result

The base64 encoding of the schema is not padded.