test: changed assert.Equal to asset.strictEqual

test-dgram-send-callback-recursive.js

PR-URL: https://github.com/nodejs/node/pull/9973


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>