Fix for Issue 21374 (#13423) (#9621)

[upstream:8d6b32e2e19fa9edbba3fbcd1f6713e92cdbbf91]

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/13423.txt

@@ -0,0 +1,3 @@
+```release-note:none
+redis: fix for test failure TestAccRedisCluster_updateClusterEndpoints issue 21374
+```

google-beta/services/redis/resource_redis_cluster_user_created_connections.go

@@ -462,8 +462,12 @@ func flattenRedisClusterUserCreatedConnectionsClusterEndpoints(v interface{}, d
 			// Do not include empty json objects coming back from the api
 			continue
 		}
+		connection := flattenRedisClusterUserCreatedConnectionsClusterEndpointsConnections(original["connections"], d, config)
+		if len(connection.([]interface{})) == 0 {
+			continue
+		}
 		transformed = append(transformed, map[string]interface{}{
-			"connections": flattenRedisClusterUserCreatedConnectionsClusterEndpointsConnections(original["connections"], d, config),
+			"connections": connection,
 		})
 	}
 	return transformed
@@ -480,9 +484,14 @@ func flattenRedisClusterUserCreatedConnectionsClusterEndpointsConnections(v inte
 			// Do not include empty json objects coming back from the api
 			continue
 		}
+		pscConnections := flattenRedisClusterUserCreatedConnectionsClusterEndpointsConnectionsPscConnection(original["pscConnection"], d, config)
+		if pscConnections == nil {
+			continue
+		}
 		transformed = append(transformed, map[string]interface{}{
-			"psc_connection": flattenRedisClusterUserCreatedConnectionsClusterEndpointsConnectionsPscConnection(original["pscConnection"], d, config),
+			"psc_connection": pscConnections,
 		})
+
 	}
 	return transformed
 }