[PE-D][Tester D] Add person command status field allowing other types than String

[nus-pe-script]

Describe the bug:
Add person command allows status values of non-string.

Steps to reproduce:
Enter the command for add person from the example, and change the status from recovering to other types like 12382

Expected behaviour:
A warning or error message shown

Actual behaviour:
The patient is added with the status of non-string

Screenshot:

Potential problematic behaviour:
The practitioner wouldn't know the status of the patient if the input was by accident a non-string.

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Labels: type.FeatureFlaw severity.Low
original: charlenetcy/ped#9