Zabbix

A.F.I..PST [ZBXNEXT-2557] added support of Zabbix proxies with legacy version

* commit '614c263f7c0619dfa24680ba01698879ab8a1a01': (90 commits)
  .......... [ZBXNEXT-2557] fixed hosts backup
  .......... [ZBXNEXT-2557] fixed after review
  .......PS. [ZBXNEXT-2557] fixed generation of templates.tmpl
  .......... [ZBXNEXT-2557,ZBXNEXT-7826] removed trailing comma
  .......... [ZBXNEXT-2557,ZBXNEXT-7826] removed trailing commas
  .......... [ZBXNEXT-2557] deleted trailing comma
  .......... [ZBXNEXT-2557,ZBXNEXT-7826] updated proxy API tests
  .......... [ZBXNEXT-2557] fixed tests
  .......... [ZBXNEXT-2557,ZBXNEXT-7826] updated proxy API tests
  .......... [ZBXNEXT-2557,ZBXNEXT-7826] updated proxy API tests
  .......... [ZBXNEXT-2557,ZBXNEXT-7826] update proxy API tests
  .......... [ZBXNEXT-2557] fixed tests
  .......... [ZBXNEXT-2557] fixed ids in test data
  .......... [ZBXNEXT-2557] fixed data in tests
  .......... [ZBXNEXT-2557] fixed tests
  .......... [ZBXNEXT-2557] fixed items tests
  .......... [ZBXNEXT-2557] deleted proxies from data_test.sql
  .......... [ZBXNEXT-2557] fixed proxies tests
  .......... [ZBXNEXT-2557] fixed host tests
  ..F....... [ZBXNEXT-2557,ZBXNEXT-7826] fixed extra non-breaking space being displayed if version is current or undefined
  ...