Handful of changes here, such as removing flush (so that mysql_user
can be used for root password changes) and other tweaks here.
Add time option to mysql::backup.
This work adds max_connections_per_hour, max_queries_per_hour, and
max_updates_per_hour support to the provider and extends self.instances to add
in the new parameters when checking existing users. It also adds
self.prefetch in order to speed up Puppet runs.
Provider is also switched to using mk_resource_methods to generate
all the resource readers, and exists? and other methods now use the
property_hash where appropriate.
Tests rewritten to handle changes and extend code coverage.
