Decide on behavior that removing a cycle from a visit has on forms that were created by it

[m-martinez]

When a visit is deleted, the forms that were associated with it are also deleted in cascade. However, when a cycle that applied to a visit is removed, the forms remain. This may be the function we want to keep, but another possibility is to delete the forms that were created by that cycle being associated with the visit on add, but leave the forms that were created by other cycles associated with the visit, including those that overlap as required with removed cycle. This decision is directly linked to how we will be relating enrollments to visits to cycles to forms in new OCCAMS, as currently it is not possible with these relations.