LP#1691269: include volume fields in converted copy templates

LP#1691269: include volume fields in converted copy templates

This patch insures that call number prefix, suffix, and classification
scheme from copy templates created in the XUL unified copy editor are
brought over to web staff copy templates.

Note that in order to successfully test the call number portion of
converted copy templates in the web staff client, the volume/copy editor
default "Allow Call Number attributes in Copy Templates" should be
turned on.

Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>