Revert "cmd/openshift-install/create: Allow hung watch"

This reverts commit 6dc1bf6, openshift#615.

109531f (cmd/openshift-install/create: Retry watch connections,
2018-11-02, openshift#606) made the watch re-connects reliable, so make watch
timeouts fatal again.  This avoids confusing users by showing "Install
complete!" messages when they may actually have a hung bootstrap
process.

cmd/openshift-install/create.go

@@ -235,8 +235,7 @@ func destroyBootstrap(ctx context.Context, directory string) (err error) {
 		},
 	)
 	if err != nil {
-		logrus.Error(errors.Wrap(err, "waiting for bootstrap-complete"))
-		return nil
+		return errors.Wrap(err, "waiting for bootstrap-complete")
 	}
 
 	logrus.Info("Destroying the bootstrap resources...")