DELTA_GRPC used for GRPC api type #8927
Description
I'm seeing delta xDS requests sent for CDS set to use regular GRPC api_type:
[2019-11-06 19:17:34.029][19268][info][upstream] [source/common/upstream/cluster_manager_impl.cc:156] cm init: initializing cds
[2019-11-06 19:17:34.030][19268][debug][config] [bazel-out/k8-fastbuild/bin/source/common/config/_virtual_includes/grpc_stream_lib/common/config/grpc_stream.h:47] Establishing new gRPC bidi stream for rpc DeltaClusters(stream .envoy.api.v2.DeltaDiscoveryRequest) returns (stream .envoy.api.v2.DeltaDiscoveryResponse);
This is for the bootstrap https://github.com/envoyproxy/go-control-plane/blob/master/sample/bootstrap-xds.yaml