The error message return from the GRPC
should be of GRPC error messages only
not the normal go errors. This commits
returns GRPC error if setAllMetadata
fails.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
(cherry picked from commit 69eb6e40dc2ab12cac2cf120f938a7f0e5016ce3)