fd9c80208c
In the DevStack caching script/element for Nodepool images, use run_local instead of subprocess.check_output in the _find_images function. The latter wasn't introduced until Python 2.7 and so won't work on CentOS 6. The script called from this function returns quickly and doesn't benefit from non-blocking I/O anyway. Change-Id: I3129f1f5b3fece321ae132ea1a52b0e156e58365
Pre-cache all of the things devstack might need