refs #6578 this is testers misunderstanding
Update the ISIS SANS related system tests to python v2

re #6578

Conflicts:

	SystemTests/AnalysisTests/SANS2DBatch.py
	SystemTests/AnalysisTests/SANS2DMultiPeriodAddFiles.py
	SystemTests/AnalysisTests/SANSLOQBatch.py
refs #6578 results of merge problems