Oracle QA: Returning Fields on Mutation

[sudowing]

Confirm that Oracle support for RETURNING after CREATE & UPDATE works correctly for REST, GraphQL & gRPC.

[sudowing]

Disable returning on SML for now. Cannot seem to build correct query with knex.js. Will make another attempt to add feature later.

LN: feature disable
https://github.com/sudowing/service-engine/pull/66/files#diff-39b2554fd18da165b59a6351b1aafff3714e2a80c1435f2de9706355b4d32351R903