Re-enabled SnapshotMarker full verification in the CollectionsSeqnoAdvanced testsuite

..

        for (const auto& e : expected.responses) {

            auto rsp = stream->public_nextQueuedItem(

                    static_cast<DcpProducer&>(*producer));

            // Note

            // All the markers generated by generateExpectedResponses() are

            // flagged by just MARKER_FLAG_MEMORY. That was correctly mirroring

            // a bug that we fixed in MB-55465, ie we fix a case in the

            // SeqnoAdvance code where a marker is generated with a missing CHK

            // flag set.

            // Problem now in this testsuite is that is more difficult to

            // predict the marker flag that is being generated by ActiveStream.

            // Sometimes the CHK is set, other times it's not, depending on

            // whether the stream jumps onto new checkpoints.

            // For that, for now we exclude SnapshotMarker in the full check.

            // @todo MB-55535: Try to re-enable full SnapshotMarker verification

            if (rsp) {

                if (rsp->getEvent() == DcpResponse::Event::SnapshotMarker) {

                    EXPECT_EQ(DcpResponse::Event::SnapshotMarker,

                              e->getEvent());

                } else {

                    EXPECT_EQ(*e, *rsp);

                }

            }

..