Syncing Develop into netcore

[andyward]

Improved regression suite 816875a : Cherry-picked OCC Fix: infinite loop 0b9ca6d : Obsoleted Unique region names ba18069 : Cherry-picked fixed up IfcCShapeProfileDef error when values of girth and tchicknes… : Cherry picked and re-implemented

Fixed XbimCurve geometry construction for trimmed ellipse 9c75105: Already fixed, but merged test

Added missing LogInfo argument - Already fixed