Rename 'Bank...' to 'bank...' as for GEM instrument re #7617

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Set instrument to GEM re #7617

This is because fitting requires the instrument name to be specified in the parameter file as well as the IDF file.
LoadFullprofResolution does not take the instrument name.

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Merge branch 'feature/7617_fullprof_to_xml' into develop