Upgrade/paraview56 python37
This is a MR to upgrade paraview from 5.4 to 5.6.1 and python from 2.7 to 3.7
- Cherry pick all commit from forked paraview 5.4
- Delete cmake messages in osx-boost-rpath script
Related to lidarview!39 (merged) and lidarview-core!170 (merged)
@nick.laurenson @nicolas.cadart @melanie.carriere @lea.vauchier