[repo] normalize ValidationError on edited entity (closes #2509729)
In CubicWeb, ValidationError.entity MUST be the eid of the involved entity,
not the entity iteself (as done by yams).
[system]
db-driver = postgres
db-host = localhost
db-port = 5433
adapter = native
db-name = cw_fti_test
db-encoding = UTF-8
db-user = syt
db-password = syt
[admin]
login = admin
password = gingkow