Update cassettes

** Why are these changes being introduced:

* Because the TimdexSearch model has been updated (to remove a number of
  aggregations / facets which are not desired), a large number of our
  cassettes need to be udpated.

** Relevant ticket(s):

* https://mitlibraries.atlassian.net/browse/rdi-197

** How does this address that need:

* This updates the cassettes which need to be changed. As usual, the
  timdex_error cassette is only updated for the request - the response
  is retained as a 500 error.

** Document any side effects to this change:

* None

Author: matt-bernhardt