hxn_panda_scan_loading_updated

[pattammattel]

changes made to load_data_from_db.py , hxn load function only

[dmgav]

I think there is something missing in this PR.

./pyxrf/model/load_data_from_db.py:954:20: F821 undefined name 'map_data2D_HDF5'
./pyxrf/model/load_data_from_db.py:973:26: F821 undefined name 'data'
./pyxrf/model/load_data_from_db.py:973:50: F821 undefined name 'data'
./pyxrf/model/load_data_from_db.py:974:9: F821 undefined name 'data'
./pyxrf/model/load_data_from_db.py:974:42: F821 undefined name 'data'