Add Azure implementation for retrieve access token task:

- add azure storage endpoints
- apply fixes to headerinfo & requestinfo for azure

indexer-service-azure/src/main/java/org/opendes/indexer/azure/util/RequestInfoImpl.java

@@ -11,11 +11,13 @@ import org.opendes.core.util.IHeadersInfo;
 import org.opendes.core.util.IServiceAccountJwtClient;
 import org.opendes.indexer.util.IRequestInfo;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
 
 import java.util.Map;
 
 import static org.opendes.client.api.DpsHeaders.AUTHORIZATION;
 
+@Component
 public class RequestInfoImpl implements IRequestInfo {
 
     @Autowired
@@ -23,8 +25,6 @@ public class RequestInfoImpl implements IRequestInfo {
     @Autowired
     private IServiceAccountJwtClient serviceAccountJwtClient;
 
-    private static final String expectedCronHeaderValue = "true";
-
     @Autowired
     private TenantInfo tenantInfo;