LHCBGAUSS-876: Fixed Bug in RadLengthColl in GaussTools

Port merge of branch 'LHCBGAUSS-876.RadLengthCollFix'

See merge request !245 (merged) for Sim09 and !277 (merged) for master

(cherry picked from commit ad8f1054)

3086f711 Fixed Bug in RadLengthColl where counters were not reset. Added option for easy…
50aaeb4a Fixed GaussGeo compatibility and added InterLength plots to VELO scan
a2104501 Make two test parts more consistent
88147f48 Update rad_length_scan.py to have correct header
6fca5ee5 Update rad_length_scan_velo_z.py to have correct header
ea9eba7c Added XY 2D Scans
0a6cf671 Set Batch Mode
a8fab663 Removed GiGaGeo option so test now runs with default reader in Gauss and added…
d6b72028 Updated Geo selection with fix
c3c04c4b Removed gROOT reset which breaks latest ROOT versions (gDirectory no longer…