We have seen what appears to be a rax api endpoint go away without
nodepool noticing. Set a 60 second api timeout on rax nodepool providers
so that the clients will give up after a 60 second period and reconnect.
Reconnecting should get us connected to a happy endpoint socket.
Change-Id: If27fc2e1d45b35bc255daba6bfbce9615dcc3cf6