fixing test_input_version (showing that maximum version check doesnt work)

Author: djarecka

nipype/interfaces/base/tests/test_core.py

@@ -237,7 +237,7 @@ class DerivedInterface2(nib.BaseInterface):
     obj = DerivedInterface2()
     obj.inputs.foo = 1
     with pytest.raises(Exception):
-        obj._check_version_requirements()
+        obj._check_version_requirements(obj.inputs)
 
     class InputSpec(nib.TraitedSpec):
         foo = nib.traits.Int(desc='a random int', max_ver='0.9')