Merge branch 'master-frame-tweak' into 'master'

Change vertical stagger progression to 0,-5,+5

See merge request faser/calypso!77

Tracker/TrackerDetDescr/FaserSCT_GeoModel/src/SCT_Frame.cxx

@@ -56,7 +56,7 @@ SCT_Frame::getParameters()
   m_sideHalfPitch  = barrelParameters->sideHalfPitch();
 
   m_stagger = 0.0;
-  if (getName().find("Upstream") != std::string::npos)
+  if (getName().find("Central") != std::string::npos)
   {
       m_stagger = -barrelParameters->phiStagger();
   }