Merge branch 'master' into dev

NOTICE

devops/gc/deploy/README.md

devops/gc/deploy/templates/deployment.yaml

devops/gc/deploy/values.yaml

devops/gc/pipeline/override-stages.yml

notification-core/pom.xml

pom.xml

provider/notification-aws/pom.xml

provider/notification-azure/pom.xml

provider/notification-gc/README.md

provider/notification-gc/cloudbuild/Dockerfile.cloudbuild

provider/notification-gc/docs/baremetal/README.md

...n-gc/docs/baremetal/pics/Notification-RabbitMQ-Config.png

provider/notification-gc/docs/baremetal/pics/client.png

provider/notification-gc/docs/baremetal/pics/rabbit.PNG

provider/notification-gc/docs/baremetal/pics/sa.png

provider/notification-gc/docs/gc/README.md

...tification-gc/docs/gc/pics/Notification-PubSub-Config.png

provider/notification-gc/pom.xml

...sdu/notification/provider/gcp/config/RedisProperties.java