Merge branch 'feature/fix-reference-element-velocityoutput' into 'master'

[porousmediumflow][velocity] Remove namespace Dune from referenceElement

See merge request !2713
6 jobs for master in 0 seconds (queued for 71 minutes and 27 seconds)
Status Name Job ID Coverage
  Trigger
passed full-dune-2.7-clang

passed full-dune-2.7-gcc

passed full-dune-master-clang

passed full-dune-master-gcc

passed minimal-dune-2.7-gcc

 
  Downstream Modules
passed trigger lecture