Opensuse tumbleweed update

[weearc]

• Update openSUSE document:
  • remove some of descriptions of tumbleweed update repo
  • update document about RIS
  • update document of slowroll
  • update document about adding repos manually in YaST2
  • update document of repo prioity
• Update packman document:
  • update method of tumbleweed and slowroll
  • update description of vendor change and prioity in zypper command

[taoky]

等一下，还有一个问题：

CodeBlock: If you don' use {{variable}} syntax in your code, and don't use "enableQuickSetup", you don't have to use <CodeBlock />. The extraneous <CodeBlock /> has code starts with: ls -la /etc/zypp/repos.d/*.rpmsave

建议本地跑一下，修掉两个文档出现的 warning。

[weearc]

建议本地跑一下，修掉两个文档出现的 warning。

Warnings fiixed in 017aa8e