Begin creating function to test eq value re #7617

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Test 'eq' value of parameters re #7617

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Tidy up code improve comments re #7617

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