Log the total number of tests and the random seed in the test runner

This might make debugging intermittent failures a bit easier in the
future because it allows us to spot unexpected differences in the number
of tests being run and allows us to run the tests locally in the same
order in case of intermittent failures.

test/unit/testreporter.js

@@ -48,7 +48,10 @@ var TestReporter = function (browser) {
 
   this.jasmineStarted = function (suiteInfo) {
     this.runnerStartTime = this.now();
-    sendInfo("Started tests for " + browser + ".");
+
+    const total = suiteInfo.totalSpecsDefined;
+    const seed = suiteInfo.order.seed;
+    sendInfo(`Started ${total} tests for ${browser} with seed ${seed}.`);
   };
 
   this.suiteStarted = function (result) {