Fix the exception handling for cleanup tasks in ClosingIterator
Update ClosingIteratorTest after Andres' cleanup task refactor
Merge pull request #1964 from jakub-/exception-handling-fix

Fix the exception handling for cleanup tasks in ClosingIterator
Make non-existent property reads return null rather than throw exceptions
Disable LOAD CSV in 2.0
Merge pull request #1999 from jakub-/map-404-key-null

Make non-existent property reads return null rather than throw exceptions
Merge pull request #1997 from jakub-/disable-load-csv

Disable LOAD CSV in 2.0
Improvement to comparing duplicated AST node children
Merge remote-tracking branch 'upstream/2.0-maint'
Enable LOAD CSV