Bug 9256 - Fix search for the packages

See the bug for a description of the problem.

This patch tries to restore searching for marcflavour != MARC21 as well as
allowing instances with different marcflavors to co-exist on the same server.

To test:
- Do a package install with e.g. the official squeeze-dev packages and create at
  least two instances, with different marcflavours, e.g.:
  sudo koha-create --create-db --marcflavor marc21 test1
  sudo koha-create --create-db --marcflavor normarc test2
- Run through the web installers for both instances and add a couple of
  records to each. Wait for the records to be indexed or run indexing manually
  with
  sudo koha-rebuild-zebra -f test1
  sudo koha-rebuild-zebra -f test2
- Try searching for the records you added. It should work in test1 but not in
  test2.
- Apply the patch and build packages with the build-git-snapshot script
- Install the new koha-common package
- Create two instances (because of Bug 9754 it is probably best to give the
  instances different names than the ones you created above, or to do this on
  a fresh VM or similar) and add records, as described above. Searching should
  now work equally well for both instances.

Please note: Because of Bug 9752 you will have to set marcflavour = NORMARC
by hand before you do the searching, if you choose NORMARC as the marc flavour
on one of the instances you create.

Please note too: I am not confident that this is the perfect solution, so
merciless and thorough testing is necessary! ;-)

Signed-off-by: Mirko Tietgen <mirko@abunchofthings.net>
Works for me for GRS-1 (package installation out of the box). Could not figure out how to set up DOM indexing and eventually stopped caring about it.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Build packages with the patch and checked that creating
instances and search within them works for both MARC21 and NORMARC.
All tests and QA script pass.
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>