Use new render_instance_selector helper
Merge pull request #79 from vuntz/render_instance_selector

https://github.com/crowbar/barclamp-keystone/pull/79

Merged by devtool for cloudsleuth
Remove possibility to use sqlite

It's known to be broken, and there was agreement to only use the
database barclamp.

This means we can remove the whole database_engine dance, which
simplifies things.
Add non-configurable attribute for http/https use in keystone

In short: this doesn't change the current behavior, and is only a
preparatory commit for future SSL support in keystone.

This is set to http right now; this will enable other barclamps to use
this attribute without breaking them, and then we can make this
configurable.
Merge pull request #80 from vuntz/no-sqlite

Remove possibility to use sqlite
Merge pull request #81 from vuntz/protocol-attribute

Add non-configurable attribute for http/https use in keystone [1/7]