Add Azure implementation for util/di files

...va/org/opendes/indexer/azure/IndexerAzureApplication.java

...re/src/main/java/org/opendes/indexer/azure/api/Hello.java

...main/java/org/opendes/indexer/azure/di/DpsLogFactory.java

.../java/org/opendes/indexer/azure/di/TenantFactoryImpl.java

...va/org/opendes/indexer/azure/di/TenantFactoryService.java

...main/java/org/opendes/indexer/azure/di/TenantInfoDoc.java

.../org/opendes/indexer/azure/util/HeadersInfoAzureImpl.java