Change permanent delete HTTP method

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/api/admin/DeviceManagementAdminService.java

@@ -248,7 +248,7 @@ public interface DeviceManagementAdminService {
                     required = true)
                     List<String> deviceIdentifiers);
 
-    @DELETE
+    @PUT
     @Path("/permanent-delete")
     @ApiOperation(
             produces = MediaType.APPLICATION_JSON,

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java

@@ -136,7 +136,7 @@ public class DeviceManagementAdminServiceImpl implements DeviceManagementAdminSe
         }
     }
 
-    @DELETE
+    @PUT
     @Override
     @Path("/permanent-delete")
     public Response deleteDevicesPermanently(List<String> deviceIdentifiers) {