Non working first step re #7674

Do not git checkbuild.

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Eliminate call of SaveNexus and LoadNexus algorithms re #7674

Now just tests saved file has 'peak_workspace' entry. Other tests for its contents to follow.

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Add check of detector IDs re #7674

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Add check of wavelengths re #7674

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Tidy code for PeaksWorkspaceTest.h re #7674

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Get createSaveTestPeaksWorkspace to use buildPW re #7674

I found out that workspace and instrument created by buildPW was adequate for my testing requirements.

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Improve comment of BuildPW re #7674

The comment now indicates that the workspace has one peak. This peak delayed work till I was aware of it.

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Merge remote branch 'origin/feature/7674_rearrange_unit_test'