feat(schema): allow set _ignore_default_error to True

[qfritz]

_ignore_default_error will ignore errors like:

"Default value must match first schema in union with type: null"

...which I agree are errors but are painful to fix when backporting stuff.

WDYT?

[qfritz]

Ah, deploy preview CI step is broken 🤔

[marcosschroh]

_ignore_default_error will ignore errors like:

"Default value must match first schema in union with type: null"

...which I agree are errors but are painful to fix when backporting stuff.

WDYT?

Thanks for the PR. I can be a good idea but we need to fix this in a different way. In the AvroSchema.init method you can get the extra fastavro property _ignore_default_error and use it when creating the schema: avro_schema = schema.AvroSchema(deployment_schema). The default value should be False to avoid a breaking change.

The deploy-preview step fails due the github actions because it still does not support deployments from a fork

[marcosschroh]

Use the property in the AvroSchema.init _ignore_default_error and use it when creating the schema.

[qfritz]

Hi again, thanks for reviewing this PR.
I tried to apply your suggestion and amended my commit (sorry, my python is rusty, i hope I got it right).

[qfritz]

Added tests! 🎉
I made sure that they pass. I'm not sure about all the init changes but if i didn't update both BaseSchema and AvroSchema, tests were failing.