Merged PR 215011: Import from OSDU

.gitlab-ci.yml

README.md

devops/Jenkinsfile

...va/org/opengroup/osdu/indexer/api/CleanupIndiciesApi.java

...va/org/opengroup/osdu/indexer/service/IndexerService.java

...rg/opengroup/osdu/indexer/service/IndexerServiceImpl.java

...rg/opengroup/osdu/indexer/service/StorageServiceImpl.java

...org/opengroup/osdu/indexer/util/ElasticClientHandler.java

...rg/opengroup/osdu/indexer/api/CleanupIndiciesApiTest.java

...pengroup/osdu/indexer/service/IndexerServiceImplTest.java

indexer-core/src/test/resources/application.properties

lombok.config

provider/indexer-gcp/README.md

provider/indexer-gcp/pom.xml

provider/indexer-gcp/src/main/appengine/app.yaml

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

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

...c/main/java/org/opengroup/osdu/indexer/kms/KmsClient.java

...engroup/osdu/indexer/persistence/DatastoreCredential.java

.../opengroup/osdu/indexer/persistence/DatastoreFactory.java