Merge branch 'fix/facet-1p-convtest-parallel' into 'master'

Fix/facet 1p convtest parallel

Closes #638

See merge request !1445

(cherry picked from commit bec8d3f4)

dc1dc29c [test][facet][1pconvergence] use executable-specifig grid file names
1d60b52c [test][facet][1pconvergence] remove obsolete restriction on input arguments