skeleton test re #5782

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Add workspaces and test properties with them re #5782

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Completer TestExec re #5782

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Add test for exception if base instruments are different re #5782

Also in previous test, verified to two workspaces do have different instruments,
even though the base instrument is the same.

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Remove workspaces after use re #5782

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Merge remote-tracking branch 'origin/feature/5782_copy_inst_param_test'