Fix a wrong expected SPARQL protocol test result

[joka921]

The test case "query specifying dataset in both query string and protocol; test for use of protocol-specified dataset"
reads as follows originally:

#### Request

    POST /sparql/?default-graph-uri=http%3A%2F%2Fkasei.us%2F2009%2F09%2Fsparql%2Fdata%2Fdata2.rdf HTTP/1.1
    Host: www.example
    User-agent: sparql-client/0.1
    Content-Type: application/sparql-query
    Content-Length: XXX

    ASK FROM <http://kasei.us/2009/09/sparql/data/data1.rdf> { <data1.rdf> ?p ?o }
    
#### Response

    2xx or 3xx response
    Content-Type: application/sparql-results+xml or application/sparql-results+json

    true

As far as I understand, the expected result of true is wrong, because

• The protocol specifies (via default-graph-uri) the default graph ...data2.rdf
• The query specifies (via FROM) the default graph data1.rdf
• SPARQL 1.1 Protocol as well as the name of the test specify, that in this case, the dataset specification ofthe protocol (so data2.rdf) should be used, which only contains theIRI <...data2.rdf>
• Therefore the expected result should be false

Additionally, the IRI in the query body doesn't use an absolute IRI and there is no base declaration, I have also added the full IRI for thi PR.

An alternative way to fix this would be to leave the expected result at "true" and change the query s.t. it asks for data2.rdf in the WHERE clause.

Please let me know what you think, and (possibly if so) were I am mistaken.
Best regards