DnnImageFeaturizingTests failing for netfx

[Anipik]

These tests were not being tested due to the bug in conditionalFact attribute.
However when I tried to run these tests on my local machine they are failing.

The call stack is this

System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
Parameter name: ModelFile
Stack Trace:
  C:\git\machinelearning\src\Microsoft.ML.OnnxTransform\OnnxTransform.cs(155,0): at Microsoft.ML.Transforms.OnnxTransformer..ctor(IHostEnvironment env, Arguments args, Byte[] modelBytes)
  C:\git\machinelearning\src\Microsoft.ML.DnnImageFeaturizer.ResNet18\ResNet18Extension.cs(43,0): at Microsoft.ML.Transforms.ResNet18Extension.ResNet18(DnnImageModelSelector dnnModelContext, IHostEnvironment env, String outputColumnName, String inputColumnName, String modelDir)
  C:\git\machinelearning\src\Microsoft.ML.DnnImageFeaturizer.ResNet18\ResNet18Extension.cs(25,0): at Microsoft.ML.Transforms.ResNet18Extension.ResNet18(DnnImageModelSelector dnnModelContext, IHostEnvironment env, String outputColumnName, String inputColumnName)
  C:\git\machinelearning\src\Microsoft.ML.OnnxTransform\DnnImageFeaturizerTransform.cs(66,0): at Microsoft.ML.Transforms.DnnImageFeaturizerEstimator..ctor(IHostEnvironment env, String outputColumnName, Func`2 modelFactory, String inputColumnName)
  C:\git\machinelearning\test\Microsoft.ML.OnnxTransformTest\DnnImageFeaturizerTest.cs(161,0): at Microsoft.ML.Tests.DnnImageFeaturizerTests.TestOldSavingAndLoading()

The tests failing due to this are
TestOldSavingAndLoading
OnnxStatic
TestDnnImageFeaturizer

cc @jignparm @yaeldekel @danmosemsft @eerhardt