fixed default license issue

components/device-mgt/org.wso2.carbon.device.mgt.mobile.impl/src/main/java/org/wso2/carbon/device/mgt/mobile/impl/android/AndroidDeviceManager.java

@@ -57,11 +57,13 @@ public class AndroidDeviceManager implements DeviceManager {
     public AndroidDeviceManager() {
         this.daoFactory = new AndroidDAOFactory();
         this.licenseManager = new RegistryBasedLicenseManager();
+        License defaultLicense;
 
-		License defaultLicense = AndroidPluginUtils.getDefaultLicense();
         try {
-			licenseManager
-					.addLicense(AndroidDeviceManagementService.DEVICE_TYPE_ANDROID, defaultLicense);
+            if (licenseManager.getLicense(AndroidDeviceManagementService.DEVICE_TYPE_ANDROID, "en_US") == null) {
+                defaultLicense = AndroidPluginUtils.getDefaultLicense();
+                licenseManager.addLicense(AndroidDeviceManagementService.DEVICE_TYPE_ANDROID, defaultLicense);
+            }
             featureManager.addSupportedFeaturesToDB();
         } catch (LicenseManagementException e) {
             log.error("Error occurred while adding default license for Android devices", e);

components/device-mgt/org.wso2.carbon.device.mgt.mobile.impl/src/main/java/org/wso2/carbon/device/mgt/mobile/impl/windows/WindowsDeviceManager.java

@@ -61,7 +61,9 @@ public class WindowsDeviceManager implements DeviceManager {
         License defaultLicense = WindowsPluginUtils.getDefaultLicense();
 
         try {
+            if (licenseManager.getLicense(WindowsDeviceManagementService.DEVICE_TYPE_WINDOWS, "en_US") == null) {
                 licenseManager.addLicense(WindowsDeviceManagementService.DEVICE_TYPE_WINDOWS, defaultLicense);
+            }
             featureManager.addSupportedFeaturesToDB();
         } catch (LicenseManagementException e) {
             log.error("Error occurred while adding default license for Windows devices", e);