Tutorials in murano are missing content

[Fan Zhang]

There is no detail content in urls beblow:

https://docs.openstack.org/murano/latest/reference/appendix/tutorials.html#ha-and-autoscaling
https://docs.openstack.org/murano/latest/reference/appendix/murano_concepts.html

This bug tracker is for errors with the documentation, use the following as a template and remove or add fields as you see fit. Convert [ ] into [x] to check boxes:

- [ ] This doc is inaccurate in this way: ______
- [x] This is a doc addition request.
- [ ] I have a fix to the document that I can paste below including example: input and output.

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-----------------------------------
Release: 6.0.0.0b2.dev19 on 2018-06-29 20:12
SHA: 50a8be764014256aea9b83837ea0ddf64719df95
Source: https://git.openstack.org/cgit/openstack/murano/tree/doc/source/reference/appendix/tutorials.rst
URL: https://docs.openstack.org/murano/latest/reference/appendix/tutorials.html

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/586394

[OpenStack Infra (hudson-openstack)]

Change abandoned by zhurong (<email address hidden>) on branch: master
Review: https://review.openstack.org/586394