Fix incorrect step result when referencing an ErrorAction

[stuartrowe]

Fix for #350.

The NodeRunStatus constructor was reading the result from the associated ErrorAction but then not directly using it to set NodeRunStatus#result. Instead this.result was always being set to BlueRunResult.FAILURE unless the local result was equal to Result.ABORTED.

I implemented a new method for translating Result to BlueRunResult and used that to set NodeRunStatus#result instead.

Before

After

Testing done

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[stuartrowe]

Bad source branch name.