Fix JSON.parse error

   JSON.parse response.body instead of response

app/services/push/huawei.rb

@@ -86,7 +86,7 @@ module Push
         headers = { 'Content-Type' => 'application/x-www-form-urlencoded' }
         response = HTTParty.post(url, body: body, headers: headers, timeout: 5)
         Push::Log.info("huawei_push: \n access_token: #{access_token} expire_time: #{$redis.ttl(Push::Huawei::ACCESS_TOKEN_KEY)}\n  url: #{url}\n body: #{body}\n response: #{response}")
-        JSON.parse(response)
+        JSON.parse(response.body)
       end
     end
   end