Build should not fail because remote resources are not available

Build of this job failed several times because dbpedia was not available.

Having the tests makes sense, but the build should not depend on external resources being reachable.

207912 [ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 11.711 s <<< FAILURE! - in xyz.ottr.lutra.bottr.source.SPARQLEndpointSourceTest 207927 [ERROR] xyz.ottr.lutra.bottr.source.SPARQLEndpointSourceTest.prototypeTest Time elapsed: 11.583 s <<< ERROR! org.apache.jena.sparql.engine.http.QueryExceptionHTTP: Unexpected error making the query: GET http://dbpedia.org/sparql?query=SELECT%20%20?s%20?p%20?o%0AWHERE%0A%20%20%7B%20?s%20%20?p%20%20?o%20%7D%0ALIMIT%20%20%2013%0A at xyz.ottr.lutra.bottr.source.SPARQLEndpointSourceTest.prototypeTest(SPARQLEndpointSourceTest.java:40) Caused by: java.net.http.HttpConnectTimeoutException: HTTP connect timed out at xyz.ottr.lutra.bottr.source.SPARQLEndpointSourceTest.prototypeTest(SPARQLEndpointSourceTest.java:40) Caused by: java.net.http.HttpConnectTimeoutException: HTTP connect timed out Caused by: java.net.ConnectException: HTTP connect timed out