Re-enable the helm chart test

The helm chart test was disabled in #2652
to solve an issue with the helm chart.

Re-enable the test now.

Author: afrittoli

test/helm_task_test.go

@@ -50,10 +50,7 @@ var (
 
 // TestHelmDeployPipelineRun is an integration test that will verify a pipeline build an image
 // and then using helm to deploy it
-
-// Temporarily disable this test to be able to merge a fix to the helm chart
-// The test will be re-enabled in https://github.com/tektoncd/pipeline/pull/2654
-func _TestHelmDeployPipelineRun(t *testing.T) {
+func TestHelmDeployPipelineRun(t *testing.T) {
 	repo := ensureDockerRepo(t)
 	c, namespace := setup(t)
 	setupClusterBindingForHelm(c, t, namespace)