removed category_ids and tax_class_id from filterable fields list

[sergy-gzh]

Tested all attributes from the issue description.
Turns out most of fields mentioned, are not available for filtering already.
Only category_ids and tax_class_id and price were still filterable.
Removed, category_ids and tax_class_id.
price attribute is still filterable. Please confirm that should be removed.

1. Limit list of filterable product fields #26: Limit list of filterable product fields

To test the issue create HTTP request to magento-domain/graphql
with Body:
{
"query": "{ products(filter: { attribute_code : { eq: "2" }}) {total_count}}"
}

Where attribute_code should be (category_ids or tax_class_id)
Magento should generate an exception with "Unknown field." message

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• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-cicd2]

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[misha-kotov]

@sergy-gzh thanks for looking into this! We can leave the price field as an available filterable field. We have removed it from the original list of fields that we wanted to eliminate as filterable.

[magento-engcom-team]

@sergy-gzh thank you for contributing. Please accept Community Contributors team invitation here to gain extended permissions for this repository.

[paliarush]

@sergy-gzh Please sign CLA above so we can accept your PR. Thanks

[paliarush]

@sergy-gzh the PR has been merged. Thank you for your contribution to GraphQL project!