1. Implement reset method that allows to start iteration from beginning of
the registry. This allows to revisit objects in scenarios like object
deletion.
2. Add filter structure that allows to select objects based on age.
Signed-off-by: Vladimir Domnich <v.domnich@yadro.com>
At the moment we don't need logic that swings back to beginning of registry when
all objects have been processed. So, for now we can stop iterating and return an
error when selector reaches the end of registry.
Signed-off-by: Vladimir Domnich <v.domnich@yadro.com>
