Change display name to Keystone

This is consistent with the other barclamps.
enforcing single proposal for keystone
Make keystone test a little more verbose.
Rename signing to token_format

This is much more explicit.
Move token format earlier in UI

The previous was kind of weird.
Make attributes label H3 as it's a header
Move admin user/password before regular user/password in the UI
Merge remote-tracking branch 'crowbar/release/pebbles/master' into release/pebbles/master
Merge pull request #76 from VictorLowther/pull-req-release-pebbles-master-242742b4b067a7627f01458f3367e810cecd83dd

https://github.com/crowbar/barclamp-keystone/pull/76

Merged by devtool for VictorLowther
Merge pull request #75 from vuntz/improve-ui

Small UI improvements
Merge pull request #77 from arkadykanevsky/pull-req-release-pebbles-master-79c57cd7d40ba8de015310df1f8f9e8b30a9b020

enforcing single proposal for all openstack barclamps [7/9]
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.
Update user passwords in keystone_register provider

When trying to create a user, if the user already exists, we were not
doing anything so far.

However, if the password is different, we need to udpate it. To avoid
changing the password with no reason, we try to get a token with the
password, and if it doesn't work, we update the password.

https://bugzilla.novell.com/show_bug.cgi?id=825622
Fix log messages

One message was talking about user instead of role, and the punctuation
wasn't totally right.
Delete the tokens that we create to test the password
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]