Opencensus Java Versions Save

What's Changed

• [v0.31.x] Fix retry stat measures to match those in grpc-java exactly (#2097) by @mackenziestarr in https://github.com/census-instrumentation/opencensus-java/pull/2102

Full Changelog: https://github.com/census-instrumentation/opencensus-java/compare/v0.31.0...v0.31.1

• fix: Shutdown Stackdriver MetricServiceClient properly by @janhicken in https://github.com/census-instrumentation/opencensus-java/pull/2091
• implement gRPC client retry stats measures and views by @mackenziestarr in https://github.com/census-instrumentation/opencensus-java/pull/2084

Full Changelog: https://github.com/census-instrumentation/opencensus-java/compare/v0.29.0...v0.31.0

• Bump log4j to 2.16.0 https://github.com/census-instrumentation/opencensus-java/pull/2087

Full Changelog: https://github.com/census-instrumentation/opencensus-java/compare/v0.29.0...v0.30.0

Breaking

• Update log4j dependency in log-trace correlation optional components. #2085

• fix: Return public access to unsafe ContextUtils api. Remove bincompat issue from 0.27.1. (#2072)
• fix: When time rewinds, avoid throwing exceptions and crashing the disruptor thread. (#2071)

This release adds support for OpenCensus to OpenTelemetry migration:

• Add Support for Opencensus to OpenTelemetry migration (#2059)

Breaking change: ContextUtils is no longer public

• Remove finalize from RecordEventsSpanImpl (#2043)

• deps: update protobuf (#2029)
• Update release versions for all readme and build files. (#2028)
• deps: update Guava to 29.0 (#2032)
• Add more InstanaExporterHandler tests (#2014)
• feat: Allow users to specify a metric display name prefix, separately from the metric name prefix (#2050)

• feat: Allow users to register the same Meter multiple times without exception (#2017)
• update gRPC (#2024): Since gRPC v1.27.0, census dependency is removed from grpc-core. A grpc-census artifact now exists to provide interceptor/stream tracer factory that applies census stats/tracing features. For users not using gRPC’s integration of census, nothing should be affected. Users who want census integration need to add grpc-census artifact to runtime classpath.
• deps: update GSON (#2025)
• deps: update auth libraries (#2023)
• update guava (#2018)

• Add an experimental artifact opencensus-contrib-observability-ready-util, that allows users to use OpenCensus easily.