mitjat

The test in [sandbox_test.go](https://github.com/oasisprotocol/oasis-core/blob/1e4123ac5b9293289376aa6191f3a999ca094644/go/runtime/host/sandbox/sandbox_test.go) only runs if `OASIS_TEST_RUNTIME_HOST_BUNDLE_PATH` is defined. However, we never set that in CI or elsewhere in the repo; we only set the older `OASIS_TEST_RUNTIME_HOST_RUNTIME_PATH` [in CI...

When specifying handlers for `Call` and `Query` methods in the SDK, they receive their arguments deserialized from cbor, and they return results without mucking with runtime-global variables. That is not...