etcd from home:eroca project

对于 openSUSE Tumbleweed，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:eroca/openSUSE_Tumbleweed/home:eroca.repo
zypper refresh
zypper install etcd

对于 16.0，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:eroca/16.0/home:eroca.repo
zypper refresh
zypper install etcd

对于 15.7，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:eroca/15.7/home:eroca.repo
zypper refresh
zypper install etcd