Const fix for ITrkVKalVrtFitter::setMassInputParticles

The input masses to the vertex fitter should be taken as const reference.

This merge request affects 2 packages:

• Tracking/TrkVertexFitter/TrkVKalVrtFitter
• Trigger/TrigHypothesis/TrigBphysHypo

added Tracking Trigger master review-pending-level-1 labels

cc @kostyuk

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-21498-2019-02-27-21-45
Athena: number of compilation errors 0, warnings 1
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 34540]

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit ba5cc865

added sweep:ignore label