Merge branch 'provider-interface' into 'master'

...er/provider/gcp/action/datastore/DatastoreActionRepo.java

.../provider/gcp/ddms/datastore/DatastoreDdmsRepository.java

...ister/provider/gcp/subscriber/SubscriptionRepository.java

...u/register/action/services/RetrieveActionServiceImpl.java

.../main/java/org/opengroup/osdu/register/api/ActionApi.java

...rc/main/java/org/opengroup/osdu/register/api/DdmsApi.java

...n/java/org/opengroup/osdu/register/api/SubscriberApi.java

.../register/ddms/persistence/mongo/MongoDdmsRepository.java

...group/osdu/register/ddms/services/ConsumptionService.java

...osdu/register/provider/interfaces/action/IActionRepo.java

...er/provider/interfaces/action/IRetrieveActionService.java

...du/register/provider/interfaces/ddms/IDdmsRepository.java

...ovider/interfaces/subscriber/ISubscriptionRepository.java

...osdu/register/subscriber/services/CreateSubscription.java

...osdu/register/subscriber/services/DeleteSubscription.java

...egister/subscriber/services/UpdateSubscriptionSecret.java

...t/java/org/opengroup/osdu/register/api/ActionApiTest.java

...est/java/org/opengroup/osdu/register/api/DdmsApiTest.java

...va/org/opengroup/osdu/register/api/SubscriberApiTest.java

...p/osdu/register/ddms/services/ConsumptionServiceTest.java