Emergency tasks

[gregorwmail]

As extension of Issue #18, I would like to propose to create separate tasks for each of the emergency group depend on the emergency services selected.

When Emergency call will be created and emergency services will be set (refer to issue #18), agent click "Dispatch" button (issue #6) to create required tasks (e.g. for police and file, etc) depend on selected emergency services. All created tasks will have a parent = Emergency record. Emergency record cannot be closed until all tasks are closed (completed of canceled).

[Rampriya-S]

FlowToHandleEmergencyCallRecords #26 pull request submitted for this issue.