Added total_confidential field to students. Currently we are not indexing these people at all.
Added a rescue for elasticsearch 404 errors when we are trying to delete from there, since we don't really care.
changed `total_confidential` to `privacy`
New versions of mail gem cause rspec to lose its mind so we've locked it within 2.5.*
Merge pull request #5 from biola/add_total_confidentials

Added total_confidential field to students and updated Elasticsearchable concern.