* Update License header for all source files
- Add Apache 2.0 header to source files that did not have one.
- Update all existing headers dated to 2019 to be 2020
- Remove comma from License header to comply with the Apache 2.0
guidelines.
* Update Copyright notice
Use the standard Copyright notices outlined by the
[CNCF](https://github.com/cncf/foundation/blob/master/copyright-notices.md#copyright-notices)
This bumps the tools we use during build and linting to latest
versions in hope of fixing an annoying warning I was often getting
during linting.
The warnings I was getting were for example:
WARN [runner] Can't run linter goanalysis_metalinter: ctrlflow: failed
prerequisites: inspect@go.opentelemetry.io/otel/exporter/metric/stdout
[go.opentelemetry.io/otel/sdk/metric.test]
WARN [runner] Can't run linter goanalysis_metalinter: fact_purity:
failed prerequisites:
buildssa@go.opentelemetry.io/otel/internal/metric
[go.opentelemetry.io/otel/api/metric.test]
* Move dependencies of tools package to a tools directory
* remove TOOLS_MOD_DIR from ALL_GO_MOD_DIRS in a Makefile.
then run 'go mod tidy' on ALL_GO_MOD_DIRS and TOOLS_MOD_DIR.
Co-authored-by: Rahul Patel <rghetia@yahoo.com>
