[Avro] Unit test for untyped map schema fails in 2.13 branch

[MichalFoksa]

Unit test TestSimpleGeneration#testSchemaForUntypedMap fails in 2.13 branch.

UnsupportedOperationException exception is thrown instead of expected InvalidDefinitionException exception.

[ERROR] Errors:
[ERROR]   TestSimpleGeneration.testSchemaForUntypedMap:166 » UnsupportedOperation Maps w...

Stack trace:

java.lang.UnsupportedOperationException: Maps with non-stringable keys are not supported yet

	at com.fasterxml.jackson.dataformat.avro.schema.MapVisitor.builtAvroSchema(MapVisitor.java:40)
	at com.fasterxml.jackson.dataformat.avro.schema.VisitorFormatWrapperImpl.getAvroSchema(VisitorFormatWrapperImpl.java:68)
	at com.fasterxml.jackson.dataformat.avro.schema.AvroSchemaGenerator.getGeneratedSchema(AvroSchemaGenerator.java:20)
	at com.fasterxml.jackson.dataformat.avro.AvroMapper.schemaFor(AvroMapper.java:187)
	at com.fasterxml.jackson.dataformat.avro.schema.TestSimpleGeneration.testSchemaForUntypedMap(TestSimpleGeneration.java:166)

In 2.13 UnknownSerializer calls visitor.expectObjectFormat(typeHint) whereas in 2.12, UnknownSerializer calls visitor.expectAnyFormat(typeHint).

It is since FasterXML/jackson-databind@f19e26e

I think the whole fix is to update exception evaluation.