More UGRID Loading Integration Tests (AVD-1517, AVD-1679, AVD-1680, AVD-1681, AVD-1683)#4074

pp-mo merged 6 commits intoSciTools:mesh-data-modelSciTools/iris:mesh-data-modelfrom

trexfeathers:AVD-1679_more_ugrid_int_teststrexfeathers/iris:AVD-1679_more_ugrid_int_testsCopy head branch name to clipboard