Use 3.8-stable tb-gateway image

application/src/main/resources/thingsboard.yml

@@ -1467,7 +1467,7 @@ device:
       pem_cert_file: "${DEVICE_CONNECTIVITY_COAPS_CA_ROOT_CERT:cafile.pem}"
     gateway:
       # The docker tag for thingsboard/tb-gateway image used in docker-compose file for gateway launch
-      image_version: "${DEVICE_CONNECTIVITY_GATEWAY_IMAGE_VERSION:3.7-stable}"
+      image_version: "${DEVICE_CONNECTIVITY_GATEWAY_IMAGE_VERSION:3.8-stable}"
 
 # Edges parameters
 edges:

application/src/test/java/org/thingsboard/server/controller/DeviceConnectivityControllerTest.java

@@ -95,7 +95,7 @@ public class DeviceConnectivityControllerTest extends AbstractControllerTest {
     private DeviceProfileId mqttDeviceProfileId;
     private DeviceProfileId coapDeviceProfileId;
 
-    @Value("${device.connectivity.gateway.image_version:3.7-stable}")
+    @Value("${device.connectivity.gateway.image_version:3.8-stable}")
     private String gatewayImageVersion;
 
     @Before

dao/src/main/java/org/thingsboard/server/dao/device/DeviceConnectivityServiceImpl.java

@@ -85,7 +85,7 @@ public class DeviceConnectivityServiceImpl implements DeviceConnectivityService
     private String mqttsPemCertFile;
     @Value("${device.connectivity.coaps.pem_cert_file:}")
     private String coapsPemCertFile;
-    @Value("${device.connectivity.gateway.image_version:3.7-stable}")
+    @Value("${device.connectivity.gateway.image_version:3.8-stable}")
     private String gatewayImageVersion;
 
     @Override