Bug 15541 - Prevent normalization during matching/import process

Bug 15541 - Prevent normalization during matching/import process

This patch allows you to use the "qualifier,qualifier" syntax
in the Record Matching Rules "Search Index" when using the QueryParser.
While QueryParser doesn't support this syntax, it will now fallback
correctly to non-QueryParser functionality. Without the patch, your search
will just fail silently.

This patch also adds a "skip_normalize" option to C4::Search::SimpleSearch(),
and uses the option during C4::Matcher::get_matches. This prevents
the s/:/=/g and s/=/:/g normalization. This normalization is heavy-handed,
and while it is necessary sometimes to generate a valid CCL query or
QueryParser query, C4::Matcher::get_matches() already produces a valid
CCL query, so we don't need to do this normalization.

Additionally, this normalization causes problems when you use a
Zebra register which isn't normalized: namely the "u" register.
Strings are stored "as is", so http://localhost/koha/resource/1 is
stored as is during indexing. When you search, you need to pass
the exact same thing through the query to get a match. Using
http=//localhost/koha/resource/1 in your query will yield zero results.

_TEST PLAN_

0) Apply patch

1) Create a Record Matching Rule in Koha with the following details:
    Matching rule code: TEST
    Description: Test
    Match threshold: 100
    Record type: Bibliographic
    Match point 1:
        Search index: id-other,st-urx
        Score: 100
        Tag: 024
        Subfields: a
        Normalization rule: None
2) Create a record in Koha with an indexable URI
    2a) Default framework
    2b) 024 $a http://koha-community.org/test $2 uri
    2c) 040 $c test
    2d) 245 $a This is a test record
    2e) 942 $c Books
    2f) Save (save again if cautioned about missing fields as these should autofill)
3) Do a full re-index of Zebra
4) Download your record from Koha as a .mrc file (ie isomarc, binary marc, etc)
5) Go to "Stage MARC records for import"
    5a) Upload your .marc file.
    5b) Change your "Record matching rule" to "Test"
    5c) Click Stage for import
9) It should say "1 records with at least one match in catalog per matching rule "Test".

NOTE: For completeness, you can go through this process on a clean master branch,
and note that it will say '0 records with at least one match in catalog per matching rule "TEST"'

Signed-off-by: Alex Buckley <alexbuckley@catalyst.net.nz>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>