i expect to have more failures if we use `prefer-stable: false`. it
would help to identify if a recent change somewhere else triggers an
issue. ideally all master branches of the cmf bundles and phpcr-odm work
together.

assume a situation like the phpcr-odm annotation bc break. until
phpcr-odm gets a new tag, the menubundle could not use the new
annotations or tests will fail.