Revert "Replace cmp_bag() with is_deeply(), the latter is more verbose"
Revert "Replace cmp_bag() with is_deeply(), the latter is more verbose"

cmp_bag() treats arrayrefs as sets, which is what we want (URLs can be
returned in any order with the current implementation).

This reverts commit bf0de00a941b884df4d6770115a110fb9e483ce4.

berkmancenter/mediacloud,berkmancenter/mediacloud,berkmancenter/mediacloud,berkmancenter/mediacloud,berkmancenter/mediacloud