test,benchmark: use deepStrictEqual()

In preparation for a lint rule that will enforce
assert.deepStrictEqual() over assert.deepEqual(), change tests and
benchmarks accordingly. For tests and benchmarks that are testing or
benchmarking assert.deepEqual() itself, apply a comment to ignore the
upcoming rule.

PR-URL: https://github.com/nodejs/node/pull/6213
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

test/parallel/test-cluster-basic.js

@@ -117,7 +117,7 @@ else if (cluster.isMaster) {
                          port: common.PORT,
                          addressType: 4,
                          fd: undefined };
-          assert.deepEqual(arguments[0], expect);
+          assert.deepStrictEqual(arguments[0], expect);
           break;
 
         default: