Fix importing of JITAR sets.

The settings `att_to_open_children` and `counts_parent_grade` were not
being transferred from the set definition file due to incorrect casing
used.  Thanks to @hal4stvf for pointing this out.

Part of the problem here is the mix of snake case and cammel case.  The
set definition file, the problem table in the database, and the default
value from `defaults.config` use `att_to_open_children`.  However, the
`addProblemToSet` method expects the argument of `attToOpenChildren`.
We need to eliminate snake case usage altogether.  It is the most
annoying case to type (`shift _ t` takes three keystrokes but `shift t`
only takes two).  But even worse is mixing these different casing
schemes, particularly as is done in this case.

This fixes issue #2897.

Author: drgrice1

lib/WeBWorK/File/SetDef.pm

@@ -197,8 +197,8 @@ sub importSetsFromDef ($ce, $db, $setDefFiles, $existingSets = undef, $assign =
 				showMeAnother     => $rh_problem->{showMeAnother},
 				showHintsAfter    => $rh_problem->{showHintsAfter},
 				prPeriod          => $rh_problem->{prPeriod},
-				attToOpenChildren => $rh_problem->{attToOpenChildren},
-				countsParentGrade => $rh_problem->{countsParentGrade}
+				attToOpenChildren => $rh_problem->{att_to_open_children},
+				countsParentGrade => $rh_problem->{counts_parent_grade}
 			);
 		}