The validation is intended mostly for tests and don't make much sense
when running the migration in production because likely there are
already running workloads. This patch changes the default to False so
migration validation must be explicitly asked for.
Change-Id: I5470f61a5e0b55bf682526208c3f57dc0ca6ffd5
Signed-off-by: Jakub Libosvar <libosvar@redhat.com>
(cherry picked from commit 0baf8841ee)