LP 1501781: Make patron name search diacritic/space insensitive.

LP 1501781: Make patron name search diacritic/space insensitive.

This commit adds the necessary code to storage actor publisher to use
the new evergreen.unaccent_and_squash db function when doing a patron
name search.

It is based on code originally by Dan Pearl, but then modified to
remove a dependency on a new Perl module by calling the db function on
the search input as well.

Signed-off-by: Jason Stephenson <jason@sigio.com>