[harmony] transition ipx.APIformatting to Harmony keys

[JessicaS11]

ipx.APIformatting handles all the formatting and validation for any API submission. This includes CMR for granule filtering and (currently) EGI for granule ordering, including submission of subsetting parameters. This module will need to be updated to:

• only accept Harmony keys (which may or may not map 1-1 with EGI keys)
• properly format acceptable subsetting key values (e.g. temporal and spatial) to be valid inputs
• update validity checks
• properly build the dictionary of params submitted by ipx.granules.place_order()