Add nsp check to 'npm test' command
Add nsp check to 'npm test' command

The nsp [node security platform] module provides a way to check a
project's node modules for known vulnerabilities.

Adding an nsp check to our regular test suite will help us keep abreast
of vulnerabilities and make changes immediately when necessary.

Change-Id: I1de849c91119b9d6aa6b7a4c76e5e30b418aa16a

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