test_cls_statelog.cc: fix resource leak, delete 'rop' at end of function

CID 1049213 (#3 of 3): Resource leak (RESOURCE_LEAK)
  leaked_storage: Variable "rop" going out of scope leaks the
  storage it points to.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>