Minor fixes on the basic install guide

* Don't list the uec images, they are not used in the guide
* Use `CirrOS` instead of `Cirros` (same as install guide)
* Add missing prompts
* Hide the quantum-ovs-cleanup listitem for ubuntu/debian

PatchSet 2:

* Fix apache error log path
* Fix hostnames on network node
* Fix mysql commands for keystone database reset

Change-Id: Ia1577900f6cc2b0549a154c2e80bd84a22fa9a4d