autoyast_xml_validator from systemsmanagement project

需要 openSUSE Tumbleweed ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/systemsmanagement/openSUSE_Tumbleweed/systemsmanagement.repo
zypper refresh
zypper install autoyast_xml_validator

需要 openSUSE Factory ARM ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/systemsmanagement/openSUSE_Factory_ARM/systemsmanagement.repo
zypper refresh
zypper install autoyast_xml_validator

需要 15.7 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/systemsmanagement/15.7/systemsmanagement.repo
zypper refresh
zypper install autoyast_xml_validator

需要 15.6 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/systemsmanagement/15.6/systemsmanagement.repo
zypper refresh
zypper install autoyast_xml_validator

需要 SLE 15 Backports ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/systemsmanagement/SLE_15_Backports/systemsmanagement.repo
zypper refresh
zypper install autoyast_xml_validator