Feature request

Feature description

Currently, if many contexts are created, rcl_logging_configure is called many times, overriding preexisting configurations silently.
Same happens with rcl_logging_fini. That destroys the logger when the first context is destructed.

The logger should be only initialized once, and initialization of future contexts should be ignored logging a warning (or handling the error somehow).

Implementation considerations

To avoid destructing the logger at the first call, an initialization count can be implemented.
The logger should be destroyed after rcl_logging_destroy was called the same times that init.

Note

Check if something similar may be happening with other "global" configurations.