Validation on position to requisition

Summary:

Validation requirement:

 If Head Count value defined on a Position “ABC” is 5. While submitting a new Job Requisition against the position “ABC”, we need to check what is the total head count mentioned on “Active” Job Requisitions that already exist against the same “ABC” position and if there is any remaining head count balance available, new Job Requisition(s) (one or many) can only be raised just within that available head count balance, otherwise system should display an error and not allow to submit the new job requisition.

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