Prevent from publishing empty rate histogram
Prevent from publishing rate histograms (Rate10s, SequencesExecutionRate10s, and DecisionsPerBCID10s), when there are no chains configured and axes are empty.
Also, add missing encapsulation and filling method to RateHistogram to avoid using the getBuffer
function (it should be used only for histogram initialization).
Related to ATR-20734
Tagging: @tbold
Edited by Aleksandra Poreba