Component-GDML test has overlaps

[Jochem Snuverink]

The Component-GDML test has overlaps:

9: Stripping off GDML names of materials, solids and volumes ...
9: Checking overlaps for volume World_PhysiComp ... 
9: -------- WWWW ------- G4Exception-START -------- WWWW -------
9: *** G4Exception : GeomVol1002
9:       issued by : G4PVPlacement::CheckOverlaps()
9: Overlap with mother volume !
9:           Overlap is detected for volume World_PhysiComp
9:           with its mother volume lhcbvelo_container_lv
9:           at mother local point (-41403.1,-50000,2827.5), overlapping by at least: 40 m  
9: NOTE: Reached maximum fixed number -1- of overlaps reports for this volume !
9: *** This is just a warning message. ***
9: -------- WWWW -------- G4Exception-END --------- WWWW -------

[Laurie Nevay]

Fixed with commit #e9926ba. Defined a more sensible world volume size in the gdml input file. GDML has no reflection so it's impossible to know how big something is - this must be specified by the user or overlaps will occur.