createrepo from OBS:Server:2.9:Staging project

对于 openSUSE 42.3，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/OBS:Server:2.9:Staging/openSUSE_42.3/OBS:Server:2.9:Staging.repo
zypper refresh
zypper install createrepo

对于 SLE 12 SP4，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/OBS:Server:2.9:Staging/SLE_12_SP4/OBS:Server:2.9:Staging.repo
zypper refresh
zypper install createrepo

对于 xUbuntu 14.04，请运行以下命令：

Keep in mind that the owner of the key may distribute updates, packages and repositories that your system will trust (more information).

echo 'deb http://download.opensuse.org/repositories/OBS:/Server:/2.9:/Staging/xUbuntu_14.04/ /' | sudo tee /etc/apt/sources.list.d/OBS:Server:2.9:Staging.list
curl -fsSL https://download.opensuse.org/repositories/OBS:Server:2.9:Staging/xUbuntu_14.04/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/OBS_Server_2.9_Staging.gpg > /dev/null
sudo apt update
sudo apt install createrepo