Bootstrap.generateGraphQLSchema fails when generic type with two distinct resolutions exists in the schema

[velias]

Follow up on generic support added in #281
Bootstrap.generateGraphQLSchema() fails when generic type with two distinct resolutions (eg. GenericType_Date and GenericType_Integer) are present in the Schema.

Caused by: graphql.AssertException: type GenericType_Date not found in schema
	at graphql.Assert.assertNotNull(Assert.java:16)
	at graphql.schema.GraphQLTypeResolvingVisitor.handleTypeReference(GraphQLTypeResolvingVisitor.java:55)
	at graphql.schema.GraphQLTypeResolvingVisitor.visitGraphQLTypeReference(GraphQLTypeResolvingVisitor.java:50)
	at graphql.schema.GraphQLTypeReference.accept(GraphQLTypeReference.java:55)
	at graphql.schema.SchemaTraverser$TraverserDelegateVisitor.enter(SchemaTraverser.java:72)
	at graphql.util.Traverser.traverse(Traverser.java:144)
	at graphql.schema.SchemaTraverser.doTraverse(SchemaTraverser.java:59)
	at graphql.schema.SchemaTraverser.depthFirst(SchemaTraverser.java:51)
	at graphql.schema.SchemaTraverser.depthFirst(SchemaTraverser.java:38)
	at graphql.schema.SchemaUtil.replaceTypeReferences(SchemaUtil.java:113)
	at graphql.schema.GraphQLSchema$Builder.buildImpl(GraphQLSchema.java:568)
	at graphql.schema.GraphQLSchema$Builder.build(GraphQLSchema.java:546)
	at io.smallrye.graphql.bootstrap.Bootstrap.generateGraphQLSchema(Bootstrap.java:143)
	at io.smallrye.graphql.bootstrap.Bootstrap.bootstrap(Bootstrap.java:103)
	at io.smallrye.graphql.cdi.producer.GraphQLProducer.initialize(GraphQLProducer.java:41)

Problem is there because Bootstrap uses java class name as a key in internal collecting maps (interfaceMap, typeMap, inputMap) so only one GraphQL type per java class is preserved.
I'm working on PR with patch (use GraphQL type name in the map).

[velias]

PR #430 created