Comment 4 for bug 1441007

It looks like openstackclient calls are eating up the window of time between n-cpu starting and ir-api coming up. I've opened https://bugs.launchpad.net/python-openstackclient/+bug/1441294 to look at that separately, but there is no harm in adjusting Ironic's api max retries here to cope with this and allow devstack more time to do whatever it may need to do (171313)