If there are closed indices with the 'universe' alias, unless we add the option to ignore unavailable indices, the delete operation fails with an error.
Add the ignore unavailable option for delete by ID/URN in discovery repository so that closed indices are ignored.
If there are closed indices with the 'universe' alias, unless we add the option to ignore unavailable indices, the delete operation fails with an error.
Add the ignore unavailable option for delete by ID/URN in discovery repository so that closed indices are ignored.
Closes #15.