Fix bug in ModelUtils.getParentName resulting in wrong inner Models f… #234

Job	Run time
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/AllOf)	1m 18s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/AnyOf)	1m 27s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/FormModels)	1m 13s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/AllOf)	2m 19s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/AnyOfNoCompare)	1m 28s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/AnyOf)	1m 7s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/OneOf)	1m 33s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/Petstore)	1m 9s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/Petstore)	1m 15s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/OneOf)	1m 18s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/UseDateTimeForDate)	1m 25s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/UseDateTimeForDate)	1m 11s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/AnyOfNoCompare)	2m 19s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/FormModels)	1m 35s
	20m 37s

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