Use helper from database cookbook to get database IP address

This way we're ready for when HA will be used for database.
Merge pull request #196 from vuntz/db-ha

Use helper from database cookbook to get database IP address
Fix use of wrong variable
Restart keystone immediately on changes of keystone.conf

This is required as we need to restart before the wakeup calls that come
just afterwards, and a delayed notification won't make this
happen.

https://bugzilla.novell.com/show_bug.cgi?id=869471
Merge pull request #197 from vuntz/wrong-var

Fix use of wrong variable
Update db password migration script to remove node attributes

On update, we want to use the db password from the proposal / role, and
not the one that might have been generated on the node (through the
cookbook). As the password is a "normal" attribute on the node, but a
"default" attribute on the role, the old one from the node is used.
Which means we really need to remove it to get the new one used.

To minimize config changes, we actually import the password from one
node (which should be good enough in most cases as we allow only one
keystone proposal, so only one node should have the password).
Merge pull request #198 from vuntz/immediate-restart

Restart keystone immediately on changes of keystone.conf
Use new synchronization helpers to avoid races when deploying with HA

There are a number of possible races when deploying keystone for the
first time:

 - when creating of the database / database user
 - when finding the PKI info so it's the same on all nodes
 - when registering the endpoint and creating users in keystone
Merge pull request #199 from vuntz/drop-db-node

Update db password migration script to remove node attributes
Merge pull request #200 from vuntz/sync-marks

Use new synchronization helpers to avoid races when deploying with HA
use clone resources with LSB RA (for now)
use new Chef::Provider::PacemakerCrowbarService
Merge pull request #195 from aspiers/clone

manage keystone backend services via clone LWRP
Use new CrowbarPacemakerHelper helpers about the cluster founder
Move the end sync mark for the PKI creation a bit later

This way, all the code between the wait and create actions is related to
that. It doesn't change anything, except that the code feels more
logical now.
Merge pull request #201 from vuntz/is-founder

Use new CrowbarPacemakerHelper helpers about the cluster founder
Merge branch 'release/roxy/master' into release/stoney/master