Added rsolr retry around save.
Added rsolr retry around save.

zhang4952/scholarsphere,samvera/hyrax,jeremyf/sufia,ndlib/scholarsphere,samvera/hyrax,ndlib/scholarsphere,jeremyf/sufia,samvera/hyrax,samvera/hyrax,zhang4952/scholarsphere,zhang4952/scholarsphere,zhang4952/scholarsphere,ndlib/scholarsphere