#1971 - Make resequence_child_weights_test unit test more reliable.
- Set the sort_column of the parent album to id, which has no possibility of being identical between the two photos.
- Now, the reweighting will reverse the order even if they were created during the same second.
Merge pull request #109 from shadlaws/fix_1971

#1971 - Make resequence_child_weights_test unit test more reliable.