Importable End-To-End Test Suite (#758)

* Rename VK to chewong for development purpose

* Rename basic_test.go to basic.go

* Add e2e.go and suite.go

* Disable tests in node.go

* End to end tests are now importable as a testing suite

* Remove 'test' from test files

* Add documentations

* Rename chewong back to virtual-kubelet

* Change 'Testing Suite' to 'Test Suite'

* Add the ability to skip certain testss

* Add unit tests for suite.go

* Add README.md for importable e2e test suite

* VK implementation has to be based on VK v1.0.0

* Stricter checks on validating test functions

* Move certain files back to internal folder

* Add WatchTimeout as a config field

* Add slight modifications

internal/test/e2e/framework/node.go

@@ -31,7 +31,7 @@ func (f *Framework) WaitUntilNodeCondition(fn watch.ConditionFunc) error {
 	}
 
 	// Watch for updates to the Pod resource until fn is satisfied, or until the timeout is reached.
-	ctx, cancel := context.WithTimeout(context.Background(), defaultWatchTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), f.WatchTimeout)
 	defer cancel()
 	last, err := watch.UntilWithSync(ctx, lw, &corev1.Node{}, nil, fn)
 	if err != nil {