converted identifiers.cfg to identifiers.yaml for consistency
converted identifiers.cfg to identifiers.yaml for consistency

UManPychron/pychron,USGSDenverPychron/pychron,UManPychron/pychron,USGSDenverPychron/pychron,NMGRL/pychron,NMGRL/pychron,USGSDenverPychron/pychron,NMGRL/pychron,UManPychron/pychron,NMGRL/pychron,USGSDenverPychron/pychron,UManPychron/pychron