Provide Spring Helper for wrapping datasource by AOP

This should make configuration (by Spring profile) much easier as it can be done with only 1 profile with something like (not real code)

``` xml
<profile name="JDBC_LOG">
    <aspect class="jdbcDsLogAspect" pointcut = "bean('datasource')" />
</profile>
```

Have some basic study to see if it is possible
