Report the ID of each suite/spec's parent

This is intended to support parallel execution, which is planned for a
future release of Jasmine. Because the execution of unrelated suites will
interleave when run in parallel, reporters will not be able to assume
that the most recent `suiteStarted` event identifies the parent of the
current suite/spec. By adding this feature now, we allow reporters to
support both parallel execution and at least some 4.x versions without
having to implement two different ways of finding the parent suite.

src/core/Suite.js

@@ -4,6 +4,7 @@ getJasmineRequireObj().Suite = function(j$) {
     this.id = attrs.id;
     this.parentSuite = attrs.parentSuite;
     this.description = attrs.description;
+    this.reportedParentSuiteId = attrs.reportedParentSuiteId;
     this.filename = attrs.filename;
     this.expectationFactory = attrs.expectationFactory;
     this.asyncExpectationFactory = attrs.asyncExpectationFactory;
@@ -110,6 +111,7 @@ getJasmineRequireObj().Suite = function(j$) {
      * @property {String} id - The unique id of this suite.
      * @property {String} description - The description text passed to the {@link describe} that made this suite.
      * @property {String} fullName - The full description including all ancestors of this suite.
+     * @property {String|null} parentSuiteId - The ID of the suite containing this suite, or null if this is not in another describe().
      * @property {String} filename - The name of the file the suite was defined in.
      * @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.
@@ -122,6 +124,7 @@ getJasmineRequireObj().Suite = function(j$) {
       id: this.id,
       description: this.description,
       fullName: this.getFullName(),
+      parentSuiteId: this.reportedParentSuiteId,
       filename: this.filename,
       failedExpectations: [],
       deprecationWarnings: [],