Fixes mock scram auth with new edgedb-python
The edgedb-python that requires this is:
@@ -536,7 +536,7 @@ async def _compile_sys_queries(schema, cluster):
async def _populate_misc_instance_data(cluster):
- mock_auth_nonce = scram.B64(scram.generate_nonce())
+ mock_auth_nonce = scram.generate_nonce()
ver = buildmeta.get_version()
json_instance_data = {
'version': {
