i.e, enable cache.

Will retry format until it works.

Fixes 29da1c75.

Those parameters now work if used from buildout and recipes that don't support serialization.

We don't care that it is a template, we care that we are generating the instance profile.

Workaround because slaptool behaves weird.
One day, my friend, one day, we'll use the new API and we won't bloat our code with exceptions.

Slaprunner SR: Set resiliency-backup-periodicity parameter so that periodicity is done every  minute.

It is done automatically through the resilient stack.

Otherwise, it breaks slapproxy.
(Even if slapproxy should support it, but that's another story.)

Also add slapos.cookbook to the list of eggs;