add @Version property to all RBAC-Entities (#34)

Co-authored-by: Michael Hoennig <michael@hoennig.de>
Reviewed-on: https://dev.hostsharing.net/hostsharing/hs.hsadmin.ng/pulls/34
Reviewed-by: Marc Sandlus <marc.sandlus@hostsharing.net>

src/main/resources/db/changelog/5-hs-office/507-sepamandate/5070-hs-office-sepamandate.sql

@@ -7,6 +7,7 @@
 create table if not exists hs_office_sepamandate
 (
     uuid                uuid unique references RbacObject (uuid) initially deferred,
+    version      int not null default 0,
     debitorUuid         uuid not null references hs_office_debitor(uuid),
     bankAccountUuid     uuid not null references hs_office_bankaccount(uuid),
     reference           varchar(96) not null,