Handle NOT NXQL constraint such as dc:contributors/* <> 'pete' for MarkLogic

Currently the MarkLogic repository doesn't handle correctly NOT semantic on list element such as it's explained here.

During this development, please add this test in TestSQLRepositoryQuery#testQueryNegativeMultiple:

dml = session.query("SELECT * FROM Document WHERE dc:contributors/* <> 'pete'");
assertEquals(2, dml.size());