Bug 28337: Use existing definition in ccl.properties and bib1.att

Bug 28337: Use existing definition in ccl.properties and bib1.att

As the field is already dfined, we don't need to add anything here.
Bib1.att can use the existing number as well

To test, enable zebra debugging in koha-conf, adding 'request' to the list:
<zebra_loglevels>none,fatal,warn,request</zebra_loglevels>

Restart all the things

Repeat matching (redo matching with no rule, then with OCN rule)
Tail the zebra-output.log and note 1=Ohter-control-number is searched and match is found
Perform a search in the staff client for: other-control-number:expialodocious
Note in logs that 1=1211 is searched

Previous test plan did not mention copying ccl.properties and bib1.att to the package install,
so highlighted that things work without these changes

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>