Merge branch 'feature/doc-donea-mom-input-parallel' into 'master'

[test][donea][mom] Add comment about current requirement overlap=1

See merge request !2886

test/freeflow/navierstokes/donea/params.input

@@ -2,6 +2,9 @@
 UpperRight = 1 1
 Cells = 40 40
 Overlap = 1
+# when refining grid make sure overlap stays 1 (only 1 currently works)
+KeepPhysicalOverlap = true
+Refinement = 0
 
 [Problem]
 Name = test_donea # name passed to the output routines