Bug 8399: No need to truncate the marc field text to 22 chars

Bug 8399: No need to truncate the marc field text to 22 chars

The text for the marc field are truncated to 22 chars when displaying an
error on mandatory fields.
This limitation is useless and this patch removes it.

Test plan:
Create a mandatory subfield and set a long text (more than 22 chars)
edit or add an authority, click on save.
You should get the error displayed with the full text

Note that this patch modifies the same code for biblio.
Test plan is the same for biblio.

Signed-off-by: Andreas Hedström Mace <andreas.hedstrom.mace@sub.su.se>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>