Zabbix

.......... [DEV-1180] added net.if.* metric support

* commit 'b7d09943aaa7a67c6d08214f01c5a2625fd1e43b':
  .......... [DEV-1180] fixed kernel plugin test case
  .......... [DEV-1180] added support for multiple metric registry with one call
  .......... [DEV-1180,DEV-1181,DEV-1182,DEV-1183,DEV-1184] changed test cases
  .......... [DEV-1180,DEV-1181,DEV-1182,DEV-1183,DEV-1184] added net.if.* plugins