[SPIKE] Investigate memory leak issues

[birschick-bq]

When I worked on another issue, the following tests have found memory leaks. They are disabled for now as root cause has not been identified.

BOOST_AUTO_TEST_CASE(TestFetchScrollLast, *disabled()) {
  CheckFetchScrollUnsupportedOrientation(SQL_FETCH_LAST);
}
 
BOOST_AUTO_TEST_CASE(TestFetchScrollPrior, *disabled()) {
  CheckFetchScrollUnsupportedOrientation(SQL_FETCH_PRIOR);
}
 
BOOST_AUTO_TEST_CASE(TestFetchScrollFirst, *disabled()) {
  CheckFetchScrollUnsupportedOrientation(SQL_FETCH_FIRST);
}

BOOST_AUTO_TEST_CASE(TestOneRowObject, *disabled()) {
...
}

BOOST_AUTO_TEST_CASE(TestCloseNonFullFetch, *disabled()) {
...
}

BOOST_AUTO_TEST_CASE(TestManyCursors, *disabled()) {
...
}

BOOST_AUTO_TEST_CASE(TestManyCursors2, *disabled()) {
...
}

Notes:

• Using Dr Memory could find the memory leak but the call stack is empty. So I suspect this issue is only seen on Windows and it is a 3rd party library memory leak issue as nothing is found on Linux. Need check more to confirm.

• No memory leak is reported on Linux after open detect_memory_leaks and enable TestFetchScrollLast - ./ignite-odbc-tests --catch_system_errors=false --detect_memory_leaks=1