Get rid of warning message from 8970

[Gesner Passos]

Deal with warning on SANS due to ticket #8970

Workspace already exists in a WorkspaceGroup
Workspace already exists in a WorkspaceGroup

Do a reduction twice and you will get this warning because it is trying to add to a WorkspaceGroup the same name.

[Gesner Passos]

Because 8970 is PatchRelease, this completes the solution, and should also go published together.

[Gesner Passos]

re #8970 Check ws belongs to group before inserting it

This get rids of warning message in SANS reduction due to inserting workspace to a group which already had that workspace.

Changeset: 74f11af570fc0755ce639dc7377fd694bc92df6d

[Gesner Passos]

The commit message was with the wrong number 8970, but if you use git macro, you won't find any problem testing this ticket.

[Gesner Passos]

Tester:

• open SANS Interface
• select SANS2D instrument
• load MaskSANS2DReductionGUI.txt user file
• change to batch mode
• load sans2d_reduction_gui_batch.csv
• Run 1D reduce
• Check that in the workspace widget, you will be able to see under sample_can_reduction the temporary workspaces
• Change to single mode
• Run 1D reduce
• In the previous version, you would see the warning message, after this ticket you should see it no more.

[Nick Draper]

Moved to patch release 3.1.1

[Peter Parker]

Merge remote-tracking branch 'origin/feature/9032_warning_msg'

Full changeset: ​680af0df21b18b52038f40b6a9b2f4ee936c7059

[Russell Taylor]

This has now been merged to the patch release branch (​https://github.com/mantidproject/mantid/commit/537dd039c47d38463d145e12deb8b6907f2fa394)

[Stuart Campbell]

This ticket has been transferred to github issue ​9875