/reference/data.rsc confusion between MiaplPy and MintPy

[falkamelung]

Hi @mirzaees
There are a number of issues with /reference/data.rsc which is created by both prep_isce.py of MintPy and prep_slc_isce.py of MiaplPy. Maybe we should rename to /reference/data_slc.rsc ? This might be better then always creating a new data.rsc as I suggested in this issue.

In the load_ifgram step of MiaplPy it uses the existing /reference/data.rsc . This causes a problem in save_HDF5EOS step of MintPy as LON_REF1 etc attributes are missing, which is described in this issue

Edited:
An *rsc file in the /merged directory is also giving trouble. I need to run rm merged/*/*rsc merged/*/*/*rsc reference/data.rsc so that the first issue above does not appear (I suspect in merged/geom_reference but I did not check)