Zabbix

.........T [ZBXNEXT-6489] added template for Huawei OceanStor 5300 V5

Merge in ZBX/zabbix from feature/ZBXNEXT-6489-5.2 to release/5.2

* commit 'c3d89a244e70411a6bab0c8f0c78c6008658cdcb':
  .........T [ZBXNEXT-6489] fixed template's group
  .........T [ZBXNEXT-6489] fixed application for calculated item
  .........T [ZBXNEXT-6489] removed {#CPU}
  .........T [ZBXNEXT-6489] fixed after review
  .........T [ZBXNEXT-6489] fixed after review
  .........T [ZBXNEXT-6489] added forum link and fixed typo
  .........T [ZBXNEXT-6489] added template for Huawei OceanStor 5300 V5