Improve quality of async timeout for afterAll spec

We found that this test was always passing and had strange interactions
with the ordering of other specs. Rewriting it to explicitly finish the
afterAll after a specified interval makes it fail correctly.

[#73742528]

spec/core/integration/EnvSpec.js

@@ -720,13 +720,15 @@ describe("Env integration", function() {
       });
 
       env.addReporter(reporter);
+      j$.DEFAULT_TIMEOUT_INTERVAL = 3000;
 
       env.describe('my suite', function() {
         env.it('my spec', function() {
         });
 
         env.afterAll(function(innerDone) {
-          jasmine.clock().tick(4312);
+          jasmine.clock().tick(3001);
+          innerDone();
         });
       });