Work on unit test LoadFullprofResolutionTest.h re #8724

Unit test crashes DO NOT GIT CHECKBUILD

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Fix bug in unit test re #8724

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Complete the unit test re #8724

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Improve documentation of algorithm re #8724

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Merge branch 'feature/8724_support_back_to_back' into develop