Allow avoiding lower-casing host/domain in UrlParser

[OlgaMaciaszek]

In some of the Spring Cloud scenarios, we expect the users to place serviceId instead of actual host/domain, and then we use it for load-balancing, getting instances from service registries, resolving contract stubs, etc., and various of these integrations are case-sensitive. Could a way be introduced to skip lower-casing (for example as a temporary solution till the next portfolio major is released)?