Merge remote-tracking branch 'origin/master' into dev

.gitlab-ci.yml

NOTICE

devops/gcp/configmap/templates/indexer-variables.yml

devops/gcp/configmap/values.yaml

indexer-core/pom.xml

pom.xml

provider/indexer-aws/pom.xml

provider/indexer-azure/pom.xml

provider/indexer-gcp/README.md

provider/indexer-gcp/docs/anthos/README.md

provider/indexer-gcp/docs/anthos/pics/client.png

provider/indexer-gcp/docs/anthos/pics/rabbit.PNG

provider/indexer-gcp/docs/anthos/pics/sa.png

provider/indexer-gcp/docs/gcp/README.md

provider/indexer-gcp/pom.xml

...pengroup/osdu/indexer/cache/DatastoreCredentialCache.java

...opengroup/osdu/indexer/cache/ElasticCredentialsCache.java

...oup/osdu/indexer/di/DatastoreCredentialsCacheFactory.java

...va/org/opengroup/osdu/indexer/di/ElasticSearchConfig.java

...osdu/indexer/di/ElasticSearchConfigurationProperties.java