Fix pkg/reconciler/taskrun_test.go TestReconcileOnCompletedTaskRun
Fix pkg/reconciler/taskrun_test.go TestReconcileOnCompletedTaskRun

Signed-off-by: Brandon Lum <3f6482c5eb7fd38182f7c556102c9a320d585f85@gmail.com>

tektoncd/pipeline,tektoncd/pipeline