Health Risk storage

[torstesu]

Purpose:
We need a location to store Health Risk, community case definitions, and suggested thresholds (for SMS escalation) in the administrative interface in order to reference in a new CBS project.

Conversation:
Each event has a designated code (numeric - continuous list) which is used for volunteer reporting (#46 - Defaulting reporting - Aggregate and #44 - Default reporting - single case) and does not change between countries and projects.

Data to populate new Health Risk storage (Health Risk TAB): https://docs.google.com/spreadsheets/d/1bfbfaTr6jx3ia7tOEZxDMDk-qrWAfS9vCoH2N-TG9zM/edit#gid=0

Constraints:

• Must be able to add/remove Health Risk, including values (e.g. Update the Community Case definition).

Confirmation:
New CBS form "Health Risk" drop-down #37 is pre-populated with "Health Risk Name".

[roarfred]

Fields from the spreadsheet has been implemented in the HealthRiskCreated event from Admin. Also, the data from the file has been used to generate testdata for Admin. Part of pull request #188