v1.5.0 release

Release of core packages

• opentelemetry-api
• opentelemetry-sdk

and exporter packages:

• opentelemetry-exporter-otlp (gRPC + HTTP/JSON)
• opentelemetry-exporter-etw
• opentelemetry-exporter-zipkin
• opentelemetry-exporter-jaeger (thrift + UDP/HTTP)

##Changelog

API

• No API change

SDK

• fix: urlPaser will incorrect parsing url like "http://abc.com/xxx@xxx/a/b" #1511
• Rename InstrumentationLibrary to InstrumentationScope #1507
• Add automatically semantic conventions from the spec (#873) #1497
• Use template class for in-memory data. #1496
• fix compiler warnings #1499
• Add trace sdk builders (#1393) #1471
• Remove reference to deprecated InstrumentationLibrary in OTLP #1469
• Fix trace kIsSampled flag set incorrectly #1465
• Fix build warnings about missing aggregates. #1368

Exporter

• Add resources to dep list of prometheus exporter test #1527
• Inline print_value() in ostream exporter #1512
• fix otlp grpc exporter naming #1488
• Fix endpoint in otlp grpc exporter #1474
• fix prometheus exporter failure type #1460

Semantic Conventions

• Upgrade to version 1.12.0 #873

Build

• Don't require applications using jaeger exporter to know about libcurl #1518
• Try to build nlohmann-json only it's depended. #1505
• Remove --config Debug when installing. #1480

Docs

• Update docs to use relative code links. #1447

Example

• Fix memory ownership of InMemorySpanExporter (#1473) #1471

Ext

• curl::HttpClient use curl_multi_handle instead of creating a thread for every request and it's able to reuse connections now. (#1317)

Metrics Features

• Enable bazel build for metrics proto files #1489
• Add metrics OTLP/HTTP exporter #1487
• OTLP gRPC Metrics Exporter #1454