tweaks to quick_metarecord_map.sql

tweaks to quick_metarecord_map.sql

* used version from wiki, which provides same results as the
  previous version but performs better on large databases
* now works without editing (a vacuum cannot run inside of a transaction)
* don't do vacuum full, just a regular vacuum analyze

[1] http://evergreen-ils.org/dokuwiki/doku.php?id=scratchpad:random_magic_spells#how_to_generate_metarecords_for_a_newly_loaded_bib_batch

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
git-svn-id: svn://svn.open-ils.org/ILS/branches/rel_2_0@20077 dcc99617-32d9-48b4-a31d-7c20da2025e4