On first run, the formatstaging/latest does not exist, so make sure we
create it and initialize it properly.
Signed-off-by: Patrick McCarty <patrick.mccarty@intel.com>
The mk_groups_ini.sh script instantiates the latest.version file on
first run, so make sure we read contents after that point.
Signed-off-by: Patrick McCarty <patrick.mccarty@intel.com>