Fixes for compatibility with passlib 1.6 (closes #2356393)
Somebody missed the memo about API backwards compatibility:
- calc_checksum is renamed _calc_checksum
- passlib.utils.handlers.GenericHandler strict keyword removed
- bytes vs str vs unicode issues
rql('SET X name "BoundaryConstraint" ''WHERE X is CWConstraintType, X name "BoundConstraint"')