Library: MergeTwoParameters amended

Merge Two Parameters allows a pair of parameters to be merged, however
the result may under some circumstances fail to meet the basic spacing
requirements for subsequent alignment. The updated code caters for this.
SpeedbrakesDeployedWithPowerOnInHeightBandsDuration

SpeedbrakesDeployedWithPowerOnInHeightBandsDuration name format revised
to remove ">" character which prevents the KPV name from forming
filenames. (For development purposes, we build histograms using the KPV
name as the root filename).