createrepo from OBS:Server:2.9:Staging project

需要 openSUSE 42.3 ，用 root 執行：

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

需要 SLE 12 SP4 ，用 root 執行：

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

需要 xUbuntu 14.04 ，執行以下：

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