Contrib: Add an exemplar_util artifact to help record special exemplars. (#1297)
* Stats: Add attachment key for TraceId and SpanId.
* Move the keys to an independent artifact and add methods for encoding.
* Add this change to CHANGELOG.
* Update description and tests.
* Have one method that takes SpanContext instead of two.
* Rename method to putSpanContextAttachments.
diff --git a/build.gradle b/build.gradle
index d42c461..2d5f14c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -359,6 +359,7 @@
name in ['opencensus-api',
'opencensus-contrib-agent',
'opencensus-contrib-appengine-standard-util',
+ 'opencensus-contrib-exemplar-util',
'opencensus-contrib-grpc-metrics',
'opencensus-contrib-grpc-util',
'opencensus-contrib-http-util',
