test: adapt and include test

Author: domachine

tests/csaf_2_1/mandatoryTest_6_1_37.js

@@ -32,7 +32,7 @@ describe('mandatoryTest_6_1_37', function () {
       ['2015-06-30T10:29:60-13:30', true],
       ['2015-06-30T23:59:60+00:00', true],
       ['2015-07-01T06:59:60+07:00', true],
-      // ['2016-12-31T00:00:60+23:59', true],
+      ['2016-12-31T00:00:60-23:59', true],
       ['2016-12-31T23:59:60+00:00', true],
       ['2017-01-01T02:59:60+03:00', true],
       ['2017-01-01T02:59:60+04:00', false],