test_registration: Added test_validation_errors() method
test_registration: Added test_validation_errors() method

Harry-R/skylines,Turbo87/skylines,dkm/skylines,skylines-project/skylines,skylines-project/skylines,skylines-project/skylines,kerel-fs/skylines,RBE-Avionik/skylines,shadowoneau/skylines,snip/skylines,snip/skylines,RBE-Avionik/skylines,skylines-project/skylines,dkm/skylines,snip/skylines,shadowoneau/skylines,Harry-R/skylines,kerel-fs/skylines,RBE-Avionik/skylines,Turbo87/skylines,Harry-R/skylines,Turbo87/skylines,Turbo87/skylines,TobiasLohner/SkyLines,RBE-Avionik/skylines,TobiasLohner/SkyLines,kerel-fs/skylines,Harry-R/skylines,dkm/skylines,dkm/skylines,shadowoneau/skylines,shadowoneau/skylines,TobiasLohner/SkyLines