Fix Unit Label for ISIS SANS Reduction

[Peter Parker]

The ISIS SANS 1D reduction does not produce workspaces with the required Y Axis units. Plotting the workspaces should show a YAxis with label I(q) (cm-1).

Also, given a non-empty YUnitLabel string, a PlotAxis should then display that string instead of any other unit settings. This is currently not the case, so this should be fixed.

[Peter Parker]

Refs #9710. Fix unit label.

Manually overwrite our own label at the end of the reduction.

Fix PolotAxis so that if the YUnitLabel of an axis has been set, then that should be displayed in plots instead of any other unit settings.

Changeset: 884eef8d41d0fd9e21c3b63643c3e8d667c28335

[Peter Parker]

Test Y-Unit labels:

• Create your own workspace with units of, for example, wavelength. Do a "Plot Spectrum..." and make sure the label is as you would expect.
• In the Python scripting window, change the Y Axis label using ​setYLabel. Replot the graph and make sure the label has now been changed.

Test unit label of ISIS SANS reduction:

• Add the LOQ data directory of the system tests repo to your managed directories, and run the following script:

from ISISCommandInterface import *

LOQ()
Detector("main-detector-bank")
MaskFile('MASK.094AA')
# apply some small artificial shift
SetDetectorOffsets('REAR', -1.0, 1.0, 0.0, 0.0, 0.0, 0.0)    
Gravity(True)

AssignSample('99630.RAW')
AssignCan('99631.RAW')

result = WavRangeReduction(None, None, False)
plotSpectrum(result, 0)

• Make sure the Y-Axis label of the resulting plot is "I(q) (cm-1)".

[Anders Markvardsen]

Merge remote-tracking branch 'origin/bugfix/9710_fix_unit_label_for_isis_sans_reduction'

Full changeset: ​d91d0c9c0d15d4e42de850f03156a4c40890a798

[Anders Markvardsen]

label show up correctly

[Stuart Campbell]

This ticket has been transferred to github issue ​10552