Improve error handling in marc2sre.pl when bib ID is not found

Improve error handling in marc2sre.pl when bib ID is not found

If we can't find a bibliographic record ID to use in our load, then
skip that MFHD record and move on to the next one. Using the counter
gives sites a chance to identify which record caused the problem.

Aside: bitmap index scans for leading '%' LIKE searches make the
--bibfield / --bibsubfield extremely slow in large datasets. If
at all possible, avoid this path!

git-svn-id: svn://svn.open-ils.org/ILS/branches/rel_2_1@20007 dcc99617-32d9-48b4-a31d-7c20da2025e4