feat(result.duration): report test duration in ms

Wrap spec start/complete in Timer start/elapsed.
configuration.timeSpecDuration = false will disable feature.

 * Add Suite result.duration, elapsed time in ms

 * Remove timeSpecDuration option.

 * Respond to review, use noopTimer

src/core/Suite.js

@@ -14,6 +14,8 @@ getJasmineRequireObj().Suite = function(j$) {
     this.beforeAllFns = [];
     this.afterAllFns = [];
 
+    this.timer = attrs.timer || j$.noopTimer;
+
     this.children = [];
 
     /**
@@ -24,13 +26,15 @@ getJasmineRequireObj().Suite = function(j$) {
      * @property {Expectation[]} failedExpectations - The list of expectations that failed in an {@link afterAll} for this suite.
      * @property {Expectation[]} deprecationWarnings - The list of deprecation warnings that occurred on this suite.
      * @property {String} status - Once the suite has completed, this string represents the pass/fail status of this suite.
+     * @property {number} duration - The time in ms for Suite execution, including any before/afterAll, before/afterEach.
      */
     this.result = {
       id: this.id,
       description: this.description,
       fullName: this.getFullName(),
       failedExpectations: [],
-      deprecationWarnings: []
+      deprecationWarnings: [],
+      duration: null,
     };
   }
 
@@ -72,6 +76,14 @@ getJasmineRequireObj().Suite = function(j$) {
     this.afterAllFns.unshift(fn);
   };
 
+  Suite.prototype.startTimer = function() {
+    this.timer.start();
+  };
+
+  Suite.prototype.endTimer = function() {
+    this.result.duration = this.timer.elapsed();
+  };
+
   function removeFns(queueableFns) {
     for(var i = 0; i < queueableFns.length; i++) {
       queueableFns[i].fn = null;