endpoint-dsl - Reference bean by #type prefix

It should be possible to refer to bean by the #type: prefix in all places of the endpoint-dsl. There are some components which does a bit of special handling (due to before property binding support was as powerful as today - it supports #type etc).

For example camel-sql, you should be able to do

SqlEndpointBuilderFactory.SqlEndpointBuilder builder
= sql("SELECT * FROM FOO").dataSource("#type:javax.sql.DataSource");

To grab the data source via the type class instead of knowing the bean id etc.