Merge branch 'master' into 'master'

Use latest slapos release.

Please accept, it passes manual wendelin standalone tests by me.
Please also propagandise change to http://deploy.nexedi.cn/wendelin-standalone so users can start to use it.

See merge request !8

playbook/wendelin-standalone.yml

@@ -3,7 +3,7 @@
   connection: local
 
   vars:
-    software_release_url: https://lab.nexedi.cn/nexedi/slapos/raw/1.0.8.1/software/wendelin/software.cfg
+    software_release_url: https://lab.nexedi.cn/nexedi/slapos/raw/1.0.12/software/wendelin/software.cfg
     startup_playbook_id: wendelin-standalone.yml
     playbook_name: wendelin
     request_instance_template: request-wendelin.j2