test: use assert.strictEqual and fix setTimeout

Changes assert.equal to assert.strictEqual in
two places and adds a second argument of 0
to setTimeout

PR-URL: https://github.com/nodejs/node/pull/9957
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-domain-timers.js

@@ -8,20 +8,21 @@ var timeout;
 var timeoutd = domain.create();
 
 timeoutd.on('error', common.mustCall(function(e) {
-  assert.equal(e.message, 'Timeout UNREFd', 'Domain should catch timer error');
+  assert.strictEqual(e.message, 'Timeout UNREFd',
+                     'Domain should catch timer error');
   clearTimeout(timeout);
 }));
 
 timeoutd.run(function() {
   setTimeout(function() {
     throw new Error('Timeout UNREFd');
-  }).unref();
+  }, 0).unref();
 });
 
 var immediated = domain.create();
 
 immediated.on('error', common.mustCall(function(e) {
-  assert.equal(e.message, 'Immediate Error',
+  assert.strictEqual(e.message, 'Immediate Error',
                      'Domain should catch immediate error');
 }));