Zabbix

.......PS. [ZBXNEXT-1633] added support of new metrics:

 - vsphere.vm.memory.size.usage.guest
 - vsphere.vm.memory.size.usage.host
 - vsphere.vm.memory.size.private
 - vsphere.vm.memory.size.shared
 - vcenter.vm.memory.size.usage.guest
 - vcenter.vm.memory.size.usage.host
 - vcenter.vm.memory.size.private
 - vcenter.vm.memory.size.shared