Bug 6480 - Koha produces a lot of apache logs for UNIMARC

Bug 6480 - Koha produces a lot of apache logs for UNIMARC

For Koha with UNIMARC a lot of entries in apache log lines are produced.

In the patch, corrections to the GetCOinSBiblio function has been introduces,
in the UNIMARC section: (i.e. || '' at the end of lines that can create this
problem) -- analogous as it is in the MARC21 section.

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
(cherry picked from commit f16abec68a4c4587027d21b6f77c2ab9d3df7007)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>