No timeouts are set for HTTP wsdl retrieval

In URIResolver, no timeout is set on the HttpURLConnection. Thus, if the connection used to retrieve wsdls/schemas "hangs", the application is frozen for ever.

Two fixes should be done:
1) Use the http conduit for all stuff if at all possible. We currently use the conduit for https only, but these should be applicable to http as well.

2) In the rare case an http conduit is not avail, set some default timeout on the stuff in URIResolver to prevent the hang.