storage_factory_test is leaking memory

[Karsten1987]

When running the tests with valgrind, we can see that there is quite some memory leaked. It increases with every library loaded.

Some of the memory not being freed is due to the rcutils_loggig_macros.
I believe the rest of it is due to Pluginlib or Poco.

[Martin-Idel-SI]

Yes, there are leaks from the pluginlib.

Here is a minimal pluginlib example: https://github.com/bsinno/rosbag2/tree/pluginlib_leak_example
It exhibits the same error I can see when running the test through valgrind:

==11631== 152 bytes in 1 blocks are indirectly lost in loss record 6 of 8
==11631== at 0x4C2E0EF: operator new(unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==11631== by 0x528F670: class_loader::impl::AbstractMetaObjectBase::AbstractMetaObjectBase(std::__cxx11::basic_string<char, std::char_traits, std::allocator > const&, std::__cxx11::basic_string<char, std::char_traits, std::allocator > const&, std::__cxx11::basic_string<char, std::char_traits, std::allocator > const&) (meta_object.cpp:56)
==11631== by 0x791766A: ???
==11631== by 0x79172FE: ???
==11631== by 0x791710A: ???
==11631== by 0x7916E49: ???
==11631== by 0x7916F33: ???
==11631== by 0x7916F49: ???
==11631== by 0x40106B9: call_init.part.0 (dl-init.c:72)
==11631== by 0x40107CA: call_init (dl-init.c:30)
==11631== by 0x40107CA: _dl_init (dl-init.c:120)
==11631== by 0x40158E1: dl_open_worker (dl-open.c:575)
==11631== by 0x4010563: _dl_catch_error (dl-error.c:187)
==11631==
==11631== 267 (16 direct, 251 indirect) bytes in 1 blocks are definitely lost in loss record 7 of 8
==11631== at 0x4C2E0EF: operator new(unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==11631== by 0x79170F4: ???
==11631== by 0x7916E49: ???
==11631== by 0x7916F33: ???
==11631== by 0x7916F49: ???
==11631== by 0x40106B9: call_init.part.0 (dl-init.c:72)
==11631== by 0x40107CA: call_init (dl-init.c:30)
==11631== by 0x40107CA: _dl_init (dl-init.c:120)
==11631== by 0x40158E1: dl_open_worker (dl-open.c:575)
==11631== by 0x4010563: _dl_catch_error (dl-error.c:187)
==11631== by 0x4014DA8: _dl_open (dl-open.c:660)
==11631== by 0x6C78F08: dlopen_doit (dlopen.c:66)
==11631== by 0x4010563: _dl_catch_error (dl-error.c:187)