The ServiceProfile describes a particular service that
is provided by the provider agent, and is part of a ProviderDescription.
A ProviderDescription can contain zero or more ServiceProfiles.
A ServiceProfile is somewhat analogous to the UDDI BusinessService.
Returns the URI where the grounding/binding file can be fouund.
Typically this file will be a WSDL file. The URI might be something
like "http://localhost:8080/DLAHQ/grounding"