Vandelay authority existing queue search repair

Vandelay authority existing queue search repair

When searching for an existing authority queue, search for an authority
queue, not a bib queue.  Apart from simply not working, the query will
fail with an "invalid input value for enum vandelay.bib_queue_queue_type"
and result in a client-side error.

https://bugs.launchpad.net/evergreen/+bug/989391

Signed-off-by: Bill Erickson <berick@esilibrary.com>
Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>