Bug 31673: (bug 31086 follow-up) Drop and constraint to allow updating column

Bug 31673: (bug 31086 follow-up) Drop and constraint to allow updating column

It seems that we cannot edit the column while it has a constraint.
If we remove it, update the oclumn, then re-add it, the update succeeds

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 0bd87ce0642e873c98b5ca8fe1a0f92aeef7511a)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 43cd28d4e8191e525a580a3c857f84420402f814)
Signed-off-by: Arthur Suzuki <arthur.suzuki@biblibre.com>