Bug 16506: Make rebuild_zebra.pl use XML as default

Bug 16506: Make rebuild_zebra.pl use XML as default

This patch deprecates the -x switch, making XML the default serialization format
used by rebuild_zebra.pl. It doesn't remove the option switch, but raises a warning
for the end user about the deprecation so they fix their cronjobs. Later we could remove it.

To test:
- Disable all indexing (daemon/cronjob)
- Create 2 records
- Edit one of them, delete the other one
- Verify they are queued for updates in zebraqueue
- sudo koha-mysql kohadev
  > SELECT * FROM zebraqueue WHERE done=0
...
| 265 |                265 | specialUpdate | biblioserver |    1 | 2016-05-13 14:23:45 |
| 266 |                  1 | recordDelete  | biblioserver |    1 | 2016-05-16 14:14:33 |
| 267 |                  2 | specialUpdate | biblioserver |    1 | 2016-05-16 14:15:06 |
+-----+--------------------+---------------+--------------+------+---------------------+
- Now go to koha-shell
  $ sudo koha-shell kohadev ; cd kohaclone
- Run:
  $ misc/migration_tools/rebuild_zebra.pl -k -b -z

  You will get something similar to this:
NOTHING cleaned : the export /tmp/jI0OeHy6Tn has been kept.
You can re-run this script with the -s  and -d /tmp/jI0OeHy6Tn parameters
if you just want to rebuild zebra after changing the record.abs
or another zebra config file
- Verify
  * less /tmp/jI0OeHy6Tn/del_biblio/exported_records
  * less /tmp/jI0OeHy6Tn/upd_biblio/exported_records
=> FAIL: They contain the records you added/modified/deleted but they are in
         USMARC format
- Apply the patch
- Mark your records for indexing (in koha-mysql kohadev)
  > UPDATE zebraqueue SET done=0 WHERE id > 264
- Run:
  $ misc/migration_tools/rebuild_zebra.pl -k -b -z

  You will get something similar to this:
<WARNINGS> [1]
NOTHING cleaned : the export /tmp/jI0OeHy6Tn has been kept.
You can re-run this script with the -s  and -d /tmp/jI0OeHy6Tn parameters
if you just want to rebuild zebra after changing the record.abs
or another zebra config file
- Verify
  * less /tmp/jI0OeHy6Tn/del_biblio/exported_records
  * less /tmp/jI0OeHy6Tn/upd_biblio/exported_records
=> SUCCESS: Data is correctly in XML format
- Run:
  $ misc/migration_tools/rebuild_zebra.pl -k -b -z -noxml

  You will get something similar to this:
<WARNINGS> [1]
NOTHING cleaned : the export /tmp/jI0OeHy6Tn has been kept.
You can re-run this script with the -s  and -d /tmp/jI0OeHy6Tn parameters
if you just want to rebuild zebra after changing the record.abs
or another zebra config file
- Verify
  * less /tmp/jI0OeHy6Tn/del_biblio/exported_records
  * less /tmp/jI0OeHy6Tn/upd_biblio/exported_records
=> SUCCESS: Data is correctly in USMARC format
- Sign off :-D

[1] Warnings covered by a followup

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
On top of Bug 16505
Work as described following test plan, usmarc default pre patch,
post patch xml default and usmarc on request.
No errors (all patchset)

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>