chore: release spanner 1.17.0 (#3861)

Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>
Co-authored-by: skuruppu <skuruppu@google.com>

Author: 3 people

spanner/CHANGES.md

@@ -1,5 +1,14 @@
 # Changes
 
+## [1.17.0](https://www.github.com/googleapis/google-cloud-go/compare/spanner/v1.16.0...spanner/v1.17.0) (2021-03-31)
+
+
+### Features
+
+* **spanner/admin/database:** add tagging request options ([2b02a03](https://www.github.com/googleapis/google-cloud-go/commit/2b02a03ff9f78884da5a8e7b64a336014c61bde7))
+* **spanner:** add RPC Priority request options ([b5b4da6](https://www.github.com/googleapis/google-cloud-go/commit/b5b4da6952922440d03051f629f3166f731dfaa3))
+* **spanner:** Add support for RPC priority ([#3341](https://www.github.com/googleapis/google-cloud-go/issues/3341)) ([88cf097](https://www.github.com/googleapis/google-cloud-go/commit/88cf097649f1cdf01cab531eabdff7fbf2be3f8f))
+
 ## [1.16.0](https://www.github.com/googleapis/google-cloud-go/compare/v1.15.0...v1.16.0) (2021-03-17)