The 652 field don't exist in UNIMARC. So linking the new enumchron to a 952 field automatically should be done only for marc21
For UNIMARC, i map it to 995$v, which has been introduced in the last release of the "recommandation 995"
adding the 995$v as well for installer
Signed-off-by: Joshua Ferraro <jmf@liblime.com>
