Do not fail immediately if wakeup fails, retry instead

Since we restart keystone immediately and then do a wakeup call,
sometimes the wakeup call fails because it cannot connect to the server
yet.

To avoid that, we should just retry the wakeup.

https://bugzilla.novell.com/show_bug.cgi?id=859678
Use provider for setting token format

The other setting triggers a deprecation warning.
Merge pull request #162 from vuntz/retry-wakeup

Do not fail immediately if wakeup fails, retry instead
Merge pull request #164 from dirkmueller/pki_token

Use provider for setting token format
Merge pull request #163 from dirkmueller/release/roxy/master

Fix setting of users default tenant
Always start keystone service when in native mode

https://bugzilla.novell.com/show_bug.cgi?id=859678
Merge pull request #165 from vuntz/bnc859678

Always start keystone service when in native mode