LP#1722827: trim spaces from 856$9 when parsing locating URIs

LP#1722827: trim spaces from 856$9 when parsing locating URIs

This patch ensures that any leading and trailing spaces
and non-breaking-spaces in the 856$9 are ignored when
extracting the org unit shortname. As a consequence,
extraneous leading/trailing whitespace in the $9 will not
prevent the located URI from being displayed in the appropriate
places.

Signed-off-by: Rogan Hamby <rogan.hamby@gmail.com>
Signed-off-by: Meg Stroup <mstroup@statelibrary.sc.gov>
Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>