Hi,
i have created packages on build.opensuse.com here:
https://build.opensuse.org/project/show/home:wurzelbro:icinga
You can get the packages via the download linke here:
https://download.opensuse.org/repositories/home:/wurzelbro:/icinga/
Feel free to copy from the sources or the packages directly.
I currently try to keep up to date with icinga, but I think it will be more difficult to reverse the spec files once icinga introduces more and more changes.
Any comments or suggestions are welcome.