Check for consecutive reservations that bypass length limit

[orenyk]

Feature request from BMEC:

... we sometimes get issues where a patron will attempt to ensure equipment availability for an extended reservation or circumvent the necessity for one by making back to back reservations on the same piece of equipment which, if the equipment is available, is entirely possible for them to do. So we'll have a single patron that has 8 reservations on a Canon Rebel over the course of a month.

My response:

[We could] check to see if there are any concurrent reservations that bypass the maximum reservation length requirement (in other words, each time they try to reserve the equipment, we can check for any overlap with an existing reservation or set of reservations and determine the total time they'd have the equipment reserved for, and compare that against the current maximum setting).

I think this would be a strong improvement to our validations, we should get this in soon.