With https://github.com/googleapis/google-cloud-go/releases/tag/v0.115.0, the opencensus support is getting deprecated. This means customers would need to explicitly set an environment variable to opencensus for their traces. This is a breaking change for customers and we need to device a mechanism to avoid this.

Rolling back to previous version for few more days to avoid this breaking change.

Just a note: to avoid this we will need to implement one of the following options,

1. So one option is to remove dependency on internal trace package and bring that tracing code into spanner.
2. Set the environment variable or call the opencensustracing setter by default on spanner client library.