Merge topic 'externalproject-cleanup' 3351b7b82c ExternalProject: Reformatting only 691f0c7612 ExternalProject: Minor cleanup to use more convenient commands b4db306aff ExternalProject: Remove unused property docs 5c021c8355 ExternalProject: Replace SEND_ERROR with FATAL_ERROR Acked-by: Kitware Robot <kwrobot@kitware.com> Merge-request: !7285