Bug 10825: don't display enum/chron twice for items received via the serials module

Bug 10825: don't display enum/chron twice for items received via the serials module

TEST PLAN
---------
1) In the staff interface, display a bib that has one or more items
   that were received in the serials module.  The following query
   can identify them:
   -- in MySQL:
      SELECT items.biblionumber,items.enumchron,serial.serialseq
      FROM items,serial,serialitems
      WHERE items.itemnumber=serialitems.itemnumber
        AND serialitems.serialid=serial.serialid;
2) Note that in the holdings tab, the serial enumeration/chronology
   is displayed twice.
3) Apply the patch
4) Refresh the screen
4) Now, the enum/chron should be displayed only once per item.

Signed-off-by: Mason James <mtj@kohaaloha.com>
Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Works as described, passes tests and QA script.
Template change only.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>