[momentum][fluxhelper][cleanup] Use naming scheme conforming variable names

5 jobs for !2882 with feature/mom-fluxhelper-namingscheme
latest detached
Status Name Job ID Coverage
  Trigger
passed full-dune-latest-release-clang

passed full-dune-latest-release-gcc

passed full-dune-master-gcc

passed minimal-dune-latest-release-gcc

 
  Downstream Modules
passed trigger lecture