Add the ASL license header on the source file

[WillemJiang]

We need to add the License header on the script files, examples and some go files. and we could use Apache Rat to check the License information when doing the release.

I just ran a quick check with apache rat.

java -jar ~/bin/apache-rat-0.12/apache-rat-0.12.jar -a -d ./

I think we could skip the json files and *.adoc file as we cannot add the license header there.

Files with unapproved licenses:

  ./.dockerignore
  ./.gitignore
  ./.gitmodules
  ./.golangci.yml
  ./.pre-commit-config.yaml
  ./Gopkg.lock
  ./Gopkg.toml
  ./README.adoc
  ./contributing.adoc
  ./go.mod
  ./go.sum
  ./assets/json-schema/CamelCatalog.json
  ./assets/json-schema/Integration.json
  ./assets/json-schema/IntegrationContext.json
  ./assets/json-schema/IntegrationPlatform.json
  ./build/Dockerfile
  ./deploy/camel-catalog-2.23.0.yaml
  ./deploy/camel-catalog-2.23.1.yaml
  ./deploy/camel-catalog-2.23.2.yaml
  ./deploy/camel-catalog-2.24.0.yaml
  ./deploy/camel-catalog-3.0.0-M2.yaml
  ./deploy/cr-example.yaml
  ./deploy/crd-build.yaml
  ./deploy/crd-camel-catalog.yaml
  ./deploy/crd-integration-context.yaml
  ./deploy/crd-integration-platform.yaml
  ./deploy/crd-integration.yaml
  ./deploy/operator-deployment.yaml
  ./deploy/operator-role-binding-knative.yaml
  ./deploy/operator-role-binding.yaml
  ./deploy/operator-role-knative.yaml
  ./deploy/operator-role-kubernetes.yaml
  ./deploy/operator-role-openshift.yaml
  ./deploy/operator-service-account.yaml
  ./deploy/platform-cr.yaml
  ./deploy/platform-integration-context-groovy.yaml
  ./deploy/platform-integration-context-jvm.yaml
  ./deploy/platform-integration-context-knative.yaml
  ./deploy/platform-integration-context-kotlin.yaml
  ./deploy/user-cluster-role.yaml
  ./deploy/olm-catalog/camel-k.package.yaml
  ./deploy/olm-catalog/camel-k.v0.3.3.clusterserviceversion.yaml
  ./deploy/olm-catalog/csv-config.yaml
  ./docs/cluster-setup.adoc
  ./docs/gke-setup.adoc
  ./docs/languages.adoc
  ./docs/traits.adoc
  ./examples/CaffeineCacheSample.java
  ./examples/RestWithRestlet.java
  ./examples/Sample.java
  ./examples/camel-caffeine.groovy
  ./examples/dns.js
  ./examples/greetings-api.json
  ./examples/greetings.groovy
  ./examples/kotlin-routes.kts
  ./examples/props.js
  ./examples/resources-data.txt
  ./examples/resources-route.groovy
  ./examples/routes-rest.js
  ./examples/routes.flow
  ./examples/routes.groovy
  ./examples/routes.js
  ./examples/simple.groovy
  ./examples/simple.js
  ./examples/kafka/README.adoc
  ./examples/kafka/SampleKafkaConsumer.java
  ./examples/kafka/application.properties
  ./examples/knative/README.adoc
  ./examples/knative/feed.groovy
  ./examples/knative/messages-channel.yaml
  ./examples/knative/printer.groovy
  ./examples/knative/reader.groovy
  ./examples/knative/splitter.groovy
  ./examples/knative/words-channel.yaml
  ./examples/knative/writer.groovy
  ./pkg/apis/addtoscheme_camel_v1alpha1.go
  ./pkg/apis/addtoscheme_knative_eventing_v1alpha1.go
  ./pkg/apis/addtoscheme_knative_serving_v1alpha1.go
  ./pkg/apis/addtoscheme_monitoring.go
  ./pkg/apis/addtoscheme_openshift.go
  ./pkg/apis/apis.go
  ./pkg/apis/camel/v1alpha1/build_types.go
  ./pkg/apis/camel/v1alpha1/camelcatalog_types.go
  ./pkg/apis/camel/v1alpha1/doc.go
  ./pkg/apis/camel/v1alpha1/integration_types.go
  ./pkg/apis/camel/v1alpha1/integrationcontext_types.go
  ./pkg/apis/camel/v1alpha1/integrationplatform_types.go
  ./pkg/apis/camel/v1alpha1/register.go
  ./pkg/apis/camel/v1alpha1/zz_generated.deepcopy.go
  ./pkg/apis/camel/v1alpha1/zz_generated.defaults.go
  ./pkg/controller/add_build.go
  ./pkg/controller/add_integration.go
  ./pkg/controller/add_integrationcontext.go
  ./pkg/controller/add_integrationplatform.go
  ./pkg/controller/controller.go
  ./pkg/controller/build/build_controller.go
  ./pkg/controller/integration/integration_controller.go
  ./pkg/controller/integrationcontext/integrationcontext_controller.go
  ./pkg/controller/integrationplatform/integrationplatform_controller.go
  ./pkg/platform/operator.go
  ./pkg/util/defaults/defaults.go

[WillemJiang]

The PR #712 was merged into master branch.