* Fix datasource-proxy log-level is not working
- Aligned default values of `Query` & `SlowQuery` in
`TraceJdbcProperties.DataSourceProxyProperties`
and `DataSourceProxyProperties`
- Add code to copy properties of `Query` and `SlowQuery` in
`DataSourceProxyConfiguration`
- Add test case to check if `log-level` can be override or not.
Fixes gh-1973
* Disable query log listener by default
- By default `QueryLogListener` and `LoggingQueryLogListener`
will be disabled, dev need to enable it by using properties
- By default `Slf4j` will be enlabled for query logging
so by adding below property slow query logging will be enabled
`spring.sleuth.jdbc.datasource-proxy.slow-query.enable-logging=true`
this property will register `SLF4JSlowQueryListener`
* Add docs for how-to enable data-proxy query logs
f7eb398917