[users] Just don't test restore-to-previous, too flaky

src/modules/users/TestSetHostNameJob.cpp

@@ -140,8 +140,7 @@ UsersTests::testHostnamed()
         // then this one should, also; or, if the previous one failed, then this
         // changes to whatever-the-hostname-is, and systemd dbus seems to call that
         // a success, as well (since nothing changes). So no failure-expectation here.
-        QEXPECT_FAIL( "", "Hostname changes are access-controlled (restore)", Continue );
-        QVERIFY( setSystemdHostname( m_originalHostName ) );
+        setSystemdHostname( m_originalHostName );
     }
 }