[Federation] Wait after cleanup only if the cleanup succeeds.

It is a waste of time to wait for the resources to cleanup if the
cleanup fails.

hack/e2e-internal/e2e-down.sh

@@ -32,24 +32,28 @@ prepare-e2e
 if [[ "${FEDERATION:-}" == "true" ]];then
   source "${KUBE_ROOT}/federation/cluster/common.sh"
 
-  cleanup-federation-api-objects || echo "Couldn't cleanup federation api objects"
+  if cleanup-federation-api-objects; then
+    # TODO(madhusudancs): This is an arbitrary amount of sleep to give
+    # Kubernetes clusters enough time to delete the underlying cloud
+    # provider resources corresponding to the Kubernetes resources we
+    # deleted as part of the test tear downs. It is shameful that we
+    # are doing this, but this is just a bandage to stop the bleeding.
+    # Please don't use this pattern anywhere. Remove this when proper
+    # cloud provider cleanups are implemented in the individual test
+    # `AfterEach` blocks.
+    # Also, we wait only if the cleanup succeeds.
+    sleep 2m
+  else
+    echo "Couldn't cleanup federation api objects"
+  fi
 
-  # TODO(madhusudancs): This is an arbitrary amount of sleep to give Kubernetes
-  # clusters enough time to delete the underlying cloud provider resources
-  # corresponding to the Kubernetes resources we deleted as part of the test
-  # teardowns. It is shameful that we are doing this, but this is just a bandage
-  # to stop the bleeding. Please don't use this pattern anywhere. Remove this
-  # when proper cloud provider cleanups are implemented in the individual test
-  # `AfterEach` blocks.
-  sleep 2m
-
-  for zone in ${E2E_ZONES};do
+  for zone in ${E2E_ZONES}; do
     # bring down an e2e cluster
     (
       set-federation-zone-vars "$zone"
       test-teardown
     )
-done
+  done
 else
   test-teardown
 fi