Removed gcp reference module.

pom.xml

provider/indexer-reference/Dockerfile

provider/indexer-reference/README.md

provider/indexer-reference/docker-compose.yml

.../kubernetes/deployments/deployment-os-indexer-service.yml

provider/indexer-reference/pom.xml

.../org/opengroup/osdu/indexer/IndexerAnthosApplication.java

...n/java/org/opengroup/osdu/indexer/ServletInitializer.java

...ava/org/opengroup/osdu/indexer/cache/AttributesCache.java

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

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

...ain/java/org/opengroup/osdu/indexer/cache/IndexCache.java

.../main/java/org/opengroup/osdu/indexer/cache/JwtCache.java

...ain/java/org/opengroup/osdu/indexer/cache/KindsCache.java

...in/java/org/opengroup/osdu/indexer/cache/SchemaCache.java

...oup/osdu/indexer/config/EntitlementsConfigProperties.java

...osdu/indexer/config/IndexerReferenceConfigProperties.java

...pengroup/osdu/indexer/config/MongoDBConfigProperties.java

...engroup/osdu/indexer/config/RabbitMqConfigProperties.java

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