Correctly mark data files with ODBL and DBCL license

tests/wells_no_perforation.data and tests/msw.data were falsely marked
as GPLv3, the rest was missing lincense marks.

tests/wells_manager_data.data

@@ -1,3 +1,9 @@
+-- This reservoir simulation deck is made available under the Open Database
+-- License: http://opendatacommons.org/licenses/odbl/1.0/. Any rights in
+-- individual contents of the database are licensed under the Database Contents
+-- License: http://opendatacommons.org/licenses/dbcl/1.0/
+
+
 RUNSPEC
 
 OIL