Increase timeout for e2e test_retry test
Increase timeout for e2e test_retry test

We were checking that the pipeline were failing in under a minute but on some
slow cloud this was not enough to detect, let's increase it to 5mn

Signed-off-by: Chmouel Boudjnah <62677a06b3e78665bfcc28953f542f81f478cf54@redhat.com>

tektoncd/pipeline,tektoncd/pipeline