[j.711] Correct offspec data export and plotting (#711) (Closes #711)

Doc/graph/ba_plot.gv

Sim/Scan/LambdaScan.cpp

Sim/Simulation/OffspecSimulation.cpp

Tests/Examples/CMakeLists.txt

Tests/ReferenceData/MiniExamples/offspec/Offspec1.int

Tests/ReferenceData/MiniExamples/offspec/OffspecLambda.int

Tests/ReferenceData/MiniExamples/offspec/OffspecResolved.int

Tests/ReferenceData/Suite/OffspecResonator.int

Tests/SimFactory/MakeSimulations.cpp

Wrap/Python/ba_plot.py

auto/Examples/offspec/OffspecLambda.py

auto/MiniExamples/offspec/OffspecLambda.py

devtools/view/plot_int.py

rawEx/offspec/OffspecLambda.py