Seg Fir

In my [fix-arrays-in-map](https://github.com/vinnier/swagger-parser/tree/fix-arrays-in-map) branch I have a file called [maps.yaml](https://github.com/vinnier/swagger-parser/blob/fix-arrays-in-map/tests/maps.yaml) which causes some problems for swagger-parser. I came across this problem when I started using swagger-tester to test the API...