Add VALIDATA_SCHEMAS_CONFIG env var support

Closed Alexandre Bulté requested to merge abulte/validata-core:alternative-schemas-toml into master

This is needed to fix validata-api#1 (closed)

It introduces a VALIDATA_SCHEMAS_CONFIG environment variable that can point to an alternative schemas.toml file path. This removes the need for the --config CLI option IMHO.

It also removes the test for the scdl- prefix on schema keys, because alternative schema producers will want to use different prefixes.

Merge request reports