fix: replace non deterministic order data structure

[shunfan-shao]

The test org.apache.cayenne.log.CompactSlf4jJdbcEventLoggerTest.compactBindings will fail under NonDex tool that detect flakiness under non-deterministic order.

In function CompactSlf4jJdbcEventLogger .collectBindings, the function is declared with the usage of HashMap.

protected void appendParameters(StringBuilder buffer, String label, ParameterBinding[] bindings) {
    ...
    buildBinding(buffer, label, collectBindings(bindings));
}

private Map<String, List<String>> collectBindings(ParameterBinding[] bindings) {
    Map<String, List<String>> bindingsMap = new HashMap<>();
    ...
    bindingsMap.computeIfAbsent(key, k -> new ArrayList<>());
    ...
    return bindingsMap;
}

Whereas the test relies on the result of the HashMap to determine the output, whereas toString should not be able to guarantee the order of insertion.

logger.appendParameters(buffer, "bind", bindings);
assertEquals(buffer.toString(), ...);

I proposed to use LinkedHashMap to keep the hash property while maintaining some kind of ordering.