icinga2 from home:mmontecchi project

需要 openSUSE Leap 42.3 Ports ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/home:mmontecchi/openSUSE_Leap_42.3_Ports/home:mmontecchi.repo
zypper refresh
zypper install icinga2